diff --git a/api/v1/artifact_types.go b/api/v1/artifact_types.go
index 97edfc43..21e44bfa 100644
--- a/api/v1/artifact_types.go
+++ b/api/v1/artifact_types.go
@@ -43,11 +43,6 @@ type Artifact struct {
 	// +optional
 	Revision string `json:"revision"`
 
-	// Checksum is the SHA256 checksum of the Artifact file.
-	// Deprecated: use Artifact.Digest instead.
-	// +optional
-	Checksum string `json:"checksum,omitempty"`
-
 	// Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
 	// +optional
 	// +kubebuilder:validation:Pattern="^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$"
@@ -76,13 +71,13 @@ func (in *Artifact) HasRevision(revision string) bool {
 	return TransformLegacyRevision(in.Revision) == TransformLegacyRevision(revision)
 }
 
-// HasChecksum returns if the given checksum matches the current Checksum of
-// the Artifact.
-func (in *Artifact) HasChecksum(checksum string) bool {
+// HasDigest returns if the given digest matches the current Digest of the
+// Artifact.
+func (in *Artifact) HasDigest(digest string) bool {
 	if in == nil {
 		return false
 	}
-	return in.Checksum == checksum
+	return in.Digest == digest
 }
 
 // ArtifactDir returns the artifact dir path in the form of
diff --git a/config/crd/bases/source.toolkit.fluxcd.io_buckets.yaml b/config/crd/bases/source.toolkit.fluxcd.io_buckets.yaml
index f7c01722..73f21a1b 100644
--- a/config/crd/bases/source.toolkit.fluxcd.io_buckets.yaml
+++ b/config/crd/bases/source.toolkit.fluxcd.io_buckets.yaml
@@ -376,10 +376,6 @@ spec:
               artifact:
                 description: Artifact represents the last successful Bucket reconciliation.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
diff --git a/config/crd/bases/source.toolkit.fluxcd.io_gitrepositories.yaml b/config/crd/bases/source.toolkit.fluxcd.io_gitrepositories.yaml
index 0588e905..de2477a0 100644
--- a/config/crd/bases/source.toolkit.fluxcd.io_gitrepositories.yaml
+++ b/config/crd/bases/source.toolkit.fluxcd.io_gitrepositories.yaml
@@ -198,10 +198,6 @@ spec:
                 description: Artifact represents the last successful GitRepository
                   reconciliation.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
@@ -325,10 +321,6 @@ spec:
                 items:
                   description: Artifact represents the output of a Source reconciliation.
                   properties:
-                    checksum:
-                      description: 'Checksum is the SHA256 checksum of the Artifact
-                        file. Deprecated: use Artifact.Digest instead.'
-                      type: string
                     digest:
                       description: Digest is the digest of the file in the form of
                         '<algorithm>:<checksum>'.
@@ -973,10 +965,6 @@ spec:
                 description: Artifact represents the last successful GitRepository
                   reconciliation.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
@@ -1100,10 +1088,6 @@ spec:
                 items:
                   description: Artifact represents the output of a Source reconciliation.
                   properties:
-                    checksum:
-                      description: 'Checksum is the SHA256 checksum of the Artifact
-                        file. Deprecated: use Artifact.Digest instead.'
-                      type: string
                     digest:
                       description: Digest is the digest of the file in the form of
                         '<algorithm>:<checksum>'.
diff --git a/config/crd/bases/source.toolkit.fluxcd.io_helmcharts.yaml b/config/crd/bases/source.toolkit.fluxcd.io_helmcharts.yaml
index 28ec52c4..6c7b468d 100644
--- a/config/crd/bases/source.toolkit.fluxcd.io_helmcharts.yaml
+++ b/config/crd/bases/source.toolkit.fluxcd.io_helmcharts.yaml
@@ -451,10 +451,6 @@ spec:
                 description: Artifact represents the output of the last successful
                   reconciliation.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
diff --git a/config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml b/config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml
index 8be7d8d2..cd8d5098 100644
--- a/config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml
+++ b/config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml
@@ -368,10 +368,6 @@ spec:
                 description: Artifact represents the last successful HelmRepository
                   reconciliation.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
diff --git a/config/crd/bases/source.toolkit.fluxcd.io_ocirepositories.yaml b/config/crd/bases/source.toolkit.fluxcd.io_ocirepositories.yaml
index d610216c..1cd95d67 100644
--- a/config/crd/bases/source.toolkit.fluxcd.io_ocirepositories.yaml
+++ b/config/crd/bases/source.toolkit.fluxcd.io_ocirepositories.yaml
@@ -194,10 +194,6 @@ spec:
                 description: Artifact represents the output of the last successful
                   OCI Repository sync.
                 properties:
-                  checksum:
-                    description: 'Checksum is the SHA256 checksum of the Artifact
-                      file. Deprecated: use Artifact.Digest instead.'
-                    type: string
                   digest:
                     description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
                     pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
diff --git a/controllers/artifact_matchers_test.go b/controllers/artifact_matchers_test.go
index 9ee26114..11b12a89 100644
--- a/controllers/artifact_matchers_test.go
+++ b/controllers/artifact_matchers_test.go
@@ -51,9 +51,6 @@ func (m matchArtifact) Match(actual interface{}) (success bool, err error) {
 	if ok, err = Equal(m.expected.Revision).Match(actualArtifact.Revision); !ok {
 		return ok, err
 	}
-	if ok, err = Equal(m.expected.Checksum).Match(actualArtifact.Checksum); !ok {
-		return ok, err
-	}
 	if ok, err = Equal(m.expected.Size).Match(actualArtifact.Size); !ok {
 		return ok, err
 	}
diff --git a/controllers/bucket_controller.go b/controllers/bucket_controller.go
index ccabfdf1..ad54781d 100644
--- a/controllers/bucket_controller.go
+++ b/controllers/bucket_controller.go
@@ -329,21 +329,13 @@ func (r *BucketReconciler) notify(ctx context.Context, oldObj, newObj *bucketv1.
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
 			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
-			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
-		}
-		if newObj.Status.Artifact.Digest != "" {
-			annotations[sourcev1.GroupVersion.Group+"/"+eventv1.MetaDigestKey] = newObj.Status.Artifact.Digest
-		}
-
-		var oldChecksum string
-		if oldObj.GetArtifact() != nil {
-			oldChecksum = oldObj.GetArtifact().Checksum
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaDigestKey):   newObj.Status.Artifact.Digest,
 		}
 
 		message := fmt.Sprintf("stored artifact with %d fetched files from '%s' bucket", index.Len(), newObj.Spec.BucketName)
 
 		// Notify on new artifact and failure recovery.
-		if oldChecksum != newObj.GetArtifact().Checksum {
+		if !oldObj.GetArtifact().HasDigest(newObj.GetArtifact().Digest) {
 			r.AnnotatedEventf(newObj, annotations, corev1.EventTypeNormal,
 				"NewArtifact", message)
 			ctrl.LoggerFrom(ctx).Info(message)
diff --git a/controllers/bucket_controller_test.go b/controllers/bucket_controller_test.go
index 409ca6f2..80b7967d 100644
--- a/controllers/bucket_controller_test.go
+++ b/controllers/bucket_controller_test.go
@@ -194,7 +194,7 @@ func TestBucketReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/d.txt",
 				Revision: "d",
-				Checksum: "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
+				Digest:   "sha256:18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
 				URL:      testStorage.Hostname + "/reconcile-storage/d.txt",
 				Size:     int64p(int64(len("d"))),
 			},
@@ -242,7 +242,7 @@ func TestBucketReconciler_reconcileStorage(t *testing.T) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     fmt.Sprintf("/reconcile-storage/hostname.txt"),
 					Revision: "f",
-					Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+					Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 					URL:      "http://outdated.com/reconcile-storage/hostname.txt",
 				}
 				if err := testStorage.MkdirAll(*obj.Status.Artifact); err != nil {
@@ -261,7 +261,7 @@ func TestBucketReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/hostname.txt",
 				Revision: "f",
-				Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+				Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 				URL:      testStorage.Hostname + "/reconcile-storage/hostname.txt",
 				Size:     int64p(int64(len("file"))),
 			},
@@ -1293,7 +1293,7 @@ func TestBucketReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			newObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 			},
 			wantEvent: "Normal NewArtifact stored artifact with 2 fetched files from",
 		},
@@ -1302,12 +1302,12 @@ func TestBucketReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal Succeeded stored artifact with 2 fetched files from",
@@ -1317,12 +1317,12 @@ func TestBucketReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Checksum: "bbb"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Digest: "bbb"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal NewArtifact stored artifact with 2 fetched files from",
@@ -1332,11 +1332,11 @@ func TestBucketReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			newObjBeforeFunc: func(obj *bucketv1.Bucket) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 		},
diff --git a/controllers/gitrepository_controller.go b/controllers/gitrepository_controller.go
index eb7b15bb..aafd51b7 100644
--- a/controllers/gitrepository_controller.go
+++ b/controllers/gitrepository_controller.go
@@ -325,15 +325,7 @@ func (r *GitRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *so
 	if r.shouldNotify(oldObj, newObj, res, resErr) {
 		annotations := map[string]string{
 			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
-			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
-		}
-		if newObj.Status.Artifact.Digest != "" {
-			annotations[sourcev1.GroupVersion.Group+"/"+eventv1.MetaDigestKey] = newObj.Status.Artifact.Digest
-		}
-
-		var oldChecksum string
-		if oldObj.GetArtifact() != nil {
-			oldChecksum = oldObj.GetArtifact().Checksum
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaDigestKey):   newObj.Status.Artifact.Digest,
 		}
 
 		// A partial commit due to no-op clone doesn't contain the commit
@@ -346,7 +338,7 @@ func (r *GitRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *so
 		}
 
 		// Notify on new artifact and failure recovery.
-		if oldChecksum != newObj.GetArtifact().Checksum {
+		if !oldObj.GetArtifact().HasDigest(newObj.GetArtifact().Digest) {
 			r.AnnotatedEventf(newObj, annotations, corev1.EventTypeNormal,
 				"NewArtifact", message)
 			ctrl.LoggerFrom(ctx).Info(message)
@@ -1019,7 +1011,7 @@ func gitContentConfigChanged(obj *sourcev1.GitRepository, includes *artifactSet)
 		observedInclArtifact := obj.Status.IncludedArtifacts[index]
 		currentIncl := artifacts[index]
 
-		// Check if the include are the same in spec and status.
+		// Check if include is the same in spec and status.
 		if !gitRepositoryIncludeEqual(incl, observedIncl) {
 			return true
 		}
@@ -1028,7 +1020,7 @@ func gitContentConfigChanged(obj *sourcev1.GitRepository, includes *artifactSet)
 		if !observedInclArtifact.HasRevision(currentIncl.Revision) {
 			return true
 		}
-		if observedInclArtifact.Checksum != currentIncl.Checksum {
+		if !observedInclArtifact.HasDigest(currentIncl.Digest) {
 			return true
 		}
 	}
diff --git a/controllers/gitrepository_controller_test.go b/controllers/gitrepository_controller_test.go
index 068d87be..688db75d 100644
--- a/controllers/gitrepository_controller_test.go
+++ b/controllers/gitrepository_controller_test.go
@@ -926,7 +926,7 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("60a3bf69f337cb5ec9ebd00abefbb6e7f2a2cf27158ecf438d52b2035b184172"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:60a3bf69f337cb5ec9ebd00abefbb6e7f2a2cf27158ecf438d52b2035b184172"))
 				t.Expect(obj.Status.IncludedArtifacts).ToNot(BeEmpty())
 				t.Expect(obj.Status.URL).ToNot(BeEmpty())
 			},
@@ -938,14 +938,14 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 		{
 			name:     "Up-to-date artifact should not update status",
 			dir:      "testdata/git/repository",
-			includes: artifactSet{&sourcev1.Artifact{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Checksum: "some-checksum"}},
+			includes: artifactSet{&sourcev1.Artifact{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Digest: "some-checksum"}},
 			beforeFunc: func(obj *sourcev1.GitRepository) {
 				obj.Spec.Interval = metav1.Duration{Duration: interval}
 				obj.Spec.Include = []sourcev1.GitRepositoryInclude{
 					{GitRepositoryRef: meta.LocalObjectReference{Name: "foo"}},
 				}
 				obj.Status.Artifact = &sourcev1.Artifact{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91"}
-				obj.Status.IncludedArtifacts = []*sourcev1.Artifact{{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Checksum: "some-checksum"}}
+				obj.Status.IncludedArtifacts = []*sourcev1.Artifact{{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Digest: "some-checksum"}}
 				obj.Status.ObservedInclude = obj.Spec.Include
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
@@ -959,14 +959,14 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 		{
 			name:     "Up-to-date artifact with legacy revision format should not update status",
 			dir:      "testdata/git/repository",
-			includes: artifactSet{&sourcev1.Artifact{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Checksum: "some-checksum"}},
+			includes: artifactSet{&sourcev1.Artifact{Revision: "main@sha1:b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Digest: "some-checksum"}},
 			beforeFunc: func(obj *sourcev1.GitRepository) {
 				obj.Spec.Interval = metav1.Duration{Duration: interval}
 				obj.Spec.Include = []sourcev1.GitRepositoryInclude{
 					{GitRepositoryRef: meta.LocalObjectReference{Name: "foo"}},
 				}
 				obj.Status.Artifact = &sourcev1.Artifact{Revision: "main/b9b3feadba509cb9b22e968a5d27e96c2bc2ff91"}
-				obj.Status.IncludedArtifacts = []*sourcev1.Artifact{{Revision: "main/b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Checksum: "some-checksum"}}
+				obj.Status.IncludedArtifacts = []*sourcev1.Artifact{{Revision: "main/b9b3feadba509cb9b22e968a5d27e96c2bc2ff91", Digest: "some-checksum"}}
 				obj.Status.ObservedInclude = obj.Spec.Include
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
@@ -987,7 +987,7 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("11f7f007dce5619bd79e6c57688261058d09f5271e802463ac39f2b9ead7cabd"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:11f7f007dce5619bd79e6c57688261058d09f5271e802463ac39f2b9ead7cabd"))
 			},
 			want: sreconcile.ResultSuccess,
 			assertConditions: []metav1.Condition{
@@ -1002,7 +1002,7 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("29186e024dde5a414cfc990829c6b2e85f6b3bd2d950f50ca9f418f5d2261d79"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:29186e024dde5a414cfc990829c6b2e85f6b3bd2d950f50ca9f418f5d2261d79"))
 			},
 			want: sreconcile.ResultSuccess,
 			assertConditions: []metav1.Condition{
@@ -1018,7 +1018,7 @@ func TestGitRepositoryReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *sourcev1.GitRepository) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("60a3bf69f337cb5ec9ebd00abefbb6e7f2a2cf27158ecf438d52b2035b184172"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:60a3bf69f337cb5ec9ebd00abefbb6e7f2a2cf27158ecf438d52b2035b184172"))
 				t.Expect(obj.Status.URL).ToNot(BeEmpty())
 			},
 			want: sreconcile.ResultSuccess,
@@ -1333,7 +1333,7 @@ func TestGitRepositoryReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/d.txt",
 				Revision: "d",
-				Checksum: "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
+				Digest:   "sha256:18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
 				URL:      testStorage.Hostname + "/reconcile-storage/d.txt",
 				Size:     int64p(int64(len("d"))),
 			},
@@ -1381,7 +1381,7 @@ func TestGitRepositoryReconciler_reconcileStorage(t *testing.T) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     "/reconcile-storage/hostname.txt",
 					Revision: "f",
-					Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+					Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 					URL:      "http://outdated.com/reconcile-storage/hostname.txt",
 				}
 				if err := testStorage.MkdirAll(*obj.Status.Artifact); err != nil {
@@ -1400,7 +1400,7 @@ func TestGitRepositoryReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/hostname.txt",
 				Revision: "f",
-				Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+				Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 				URL:      testStorage.Hostname + "/reconcile-storage/hostname.txt",
 				Size:     int64p(int64(len("file"))),
 			},
@@ -2052,7 +2052,7 @@ func TestGitRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			newObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 			},
 			commit:    concreteCommit,
 			wantEvent: "Normal NewArtifact stored artifact for commit 'test commit'",
@@ -2062,12 +2062,12 @@ func TestGitRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			commit:    concreteCommit,
@@ -2078,12 +2078,12 @@ func TestGitRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Checksum: "bbb"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Digest: "bbb"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			commit:    concreteCommit,
@@ -2094,11 +2094,11 @@ func TestGitRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			newObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 		},
@@ -2107,12 +2107,12 @@ func TestGitRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultEmpty,
 			resErr: noopErr,
 			oldObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *sourcev1.GitRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			commit:    partialCommit, // no-op will always result in partial commit.
@@ -2484,11 +2484,11 @@ func TestGitContentConfigChanged(t *testing.T) {
 							ToPath:           "baz",
 						},
 					},
-					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Checksum: "bbb"}},
+					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Digest: "bbb"}},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "bbb"},
+				{Revision: "aaa", Digest: "bbb"},
 			},
 			want: false,
 		},
@@ -2512,16 +2512,16 @@ func TestGitContentConfigChanged(t *testing.T) {
 							ToPath:           "baz",
 						},
 					},
-					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Checksum: "bbb"}},
+					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Digest: "bbb"}},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "ccc", Checksum: "bbb"},
+				{Revision: "ccc", Digest: "bbb"},
 			},
 			want: true,
 		},
 		{
-			name: "observed include but different artifact checksum",
+			name: "observed include but different artifact digest",
 			obj: sourcev1.GitRepository{
 				Spec: sourcev1.GitRepositorySpec{
 					Include: []sourcev1.GitRepositoryInclude{
@@ -2540,11 +2540,11 @@ func TestGitContentConfigChanged(t *testing.T) {
 							ToPath:           "baz",
 						},
 					},
-					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Checksum: "bbb"}},
+					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Digest: "bbb"}},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "ddd"},
+				{Revision: "aaa", Digest: "ddd"},
 			},
 			want: true,
 		},
@@ -2568,11 +2568,11 @@ func TestGitContentConfigChanged(t *testing.T) {
 							ToPath:           "baz",
 						},
 					},
-					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Checksum: "bbb"}},
+					IncludedArtifacts: []*sourcev1.Artifact{{Revision: "aaa", Digest: "bbb"}},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "bbb"},
+				{Revision: "aaa", Digest: "bbb"},
 			},
 			want: true,
 		},
@@ -2595,14 +2595,14 @@ func TestGitContentConfigChanged(t *testing.T) {
 				},
 				Status: sourcev1.GitRepositoryStatus{
 					IncludedArtifacts: []*sourcev1.Artifact{
-						{Revision: "aaa", Checksum: "bbb"},
-						{Revision: "ccc", Checksum: "ccc"},
+						{Revision: "aaa", Digest: "bbb"},
+						{Revision: "ccc", Digest: "ccc"},
 					},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "bbb"},
-				{Revision: "ccc", Checksum: "ddd"},
+				{Revision: "aaa", Digest: "bbb"},
+				{Revision: "ccc", Digest: "ddd"},
 			},
 			want: true,
 		},
@@ -2637,13 +2637,13 @@ func TestGitContentConfigChanged(t *testing.T) {
 						},
 					},
 					IncludedArtifacts: []*sourcev1.Artifact{
-						{Revision: "aaa", Checksum: "bbb"},
-						{Revision: "ccc", Checksum: "ccc"},
+						{Revision: "aaa", Digest: "bbb"},
+						{Revision: "ccc", Digest: "ccc"},
 					},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "bbb"},
+				{Revision: "aaa", Digest: "bbb"},
 			},
 			want: true,
 		},
@@ -2678,13 +2678,13 @@ func TestGitContentConfigChanged(t *testing.T) {
 						},
 					},
 					IncludedArtifacts: []*sourcev1.Artifact{
-						{Revision: "aaa", Checksum: "bbb"},
+						{Revision: "aaa", Digest: "bbb"},
 					},
 				},
 			},
 			artifacts: []*sourcev1.Artifact{
-				{Revision: "aaa", Checksum: "bbb"},
-				{Revision: "ccc", Checksum: "ccc"},
+				{Revision: "aaa", Digest: "bbb"},
+				{Revision: "ccc", Digest: "ccc"},
 			},
 			want: true,
 		},
diff --git a/controllers/helmchart_controller.go b/controllers/helmchart_controller.go
index 192cffce..5826313d 100644
--- a/controllers/helmchart_controller.go
+++ b/controllers/helmchart_controller.go
@@ -332,19 +332,11 @@ func (r *HelmChartReconciler) notify(ctx context.Context, oldObj, newObj *helmv1
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
 			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
-			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
-		}
-		if newObj.Status.Artifact.Digest != "" {
-			annotations[sourcev1.GroupVersion.Group+"/"+eventv1.MetaDigestKey] = newObj.Status.Artifact.Digest
-		}
-
-		var oldChecksum string
-		if oldObj.GetArtifact() != nil {
-			oldChecksum = oldObj.GetArtifact().Checksum
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaDigestKey):   newObj.Status.Artifact.Digest,
 		}
 
 		// Notify on new artifact and failure recovery.
-		if oldChecksum != newObj.GetArtifact().Checksum {
+		if !oldObj.GetArtifact().HasDigest(newObj.GetArtifact().Digest) {
 			r.AnnotatedEventf(newObj, annotations, corev1.EventTypeNormal,
 				reasonForBuild(build), build.Summary())
 			ctrl.LoggerFrom(ctx).Info(build.Summary())
@@ -803,7 +795,7 @@ func (r *HelmChartReconciler) buildFromTarballArtifact(ctx context.Context, obj
 		}
 		if obj.Spec.SourceRef.Kind == helmv1.BucketKind {
 			if dig := digest.Digest(sourcev1.TransformLegacyRevision(rev)); dig.Validate() == nil {
-				rev = dig.Hex()
+				rev = dig.Encoded()
 			}
 		}
 		if kind := obj.Spec.SourceRef.Kind; kind == sourcev1.GitRepositoryKind || kind == helmv1.BucketKind {
diff --git a/controllers/helmchart_controller_test.go b/controllers/helmchart_controller_test.go
index 900d3b4e..00924d29 100644
--- a/controllers/helmchart_controller_test.go
+++ b/controllers/helmchart_controller_test.go
@@ -315,7 +315,7 @@ func TestHelmChartReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/d.txt",
 				Revision: "d",
-				Checksum: "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
+				Digest:   "sha256:18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
 				URL:      testStorage.Hostname + "/reconcile-storage/d.txt",
 				Size:     int64p(int64(len("d"))),
 			},
@@ -363,7 +363,7 @@ func TestHelmChartReconciler_reconcileStorage(t *testing.T) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     "/reconcile-storage/hostname.txt",
 					Revision: "f",
-					Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+					Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 					URL:      "http://outdated.com/reconcile-storage/hostname.txt",
 				}
 				if err := testStorage.MkdirAll(*obj.Status.Artifact); err != nil {
@@ -382,7 +382,7 @@ func TestHelmChartReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/hostname.txt",
 				Revision: "f",
-				Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+				Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 				URL:      testStorage.Hostname + "/reconcile-storage/hostname.txt",
 				Size:     int64p(int64(len("file"))),
 			},
@@ -1440,7 +1440,7 @@ func TestHelmChartReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *helmv1.HelmChart) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("bbdf96023c912c393b49d5238e227576ed0d20d1bb145d7476d817b80e20c11a"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:bbdf96023c912c393b49d5238e227576ed0d20d1bb145d7476d817b80e20c11a"))
 				t.Expect(obj.GetArtifact().Revision).To(Equal("0.1.0"))
 				t.Expect(obj.Status.URL).ToNot(BeEmpty())
 				t.Expect(obj.Status.ObservedChartName).To(Equal("helmchart"))
@@ -1501,7 +1501,7 @@ func TestHelmChartReconciler_reconcileArtifact(t *testing.T) {
 			},
 			afterFunc: func(t *WithT, obj *helmv1.HelmChart) {
 				t.Expect(obj.GetArtifact()).ToNot(BeNil())
-				t.Expect(obj.GetArtifact().Checksum).To(Equal("bbdf96023c912c393b49d5238e227576ed0d20d1bb145d7476d817b80e20c11a"))
+				t.Expect(obj.GetArtifact().Digest).To(Equal("sha256:bbdf96023c912c393b49d5238e227576ed0d20d1bb145d7476d817b80e20c11a"))
 				t.Expect(obj.GetArtifact().Revision).To(Equal("0.1.0"))
 				t.Expect(obj.Status.URL).ToNot(BeEmpty())
 				t.Expect(obj.Status.ObservedChartName).To(Equal("helmchart"))
@@ -2088,7 +2088,7 @@ func TestHelmChartReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			newObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 			},
 			wantEvent: "Normal ChartPackageSucceeded packaged",
 		},
@@ -2097,12 +2097,12 @@ func TestHelmChartReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal ChartPackageSucceeded packaged",
@@ -2112,12 +2112,12 @@ func TestHelmChartReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Checksum: "bbb"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Digest: "bbb"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal ChartPackageSucceeded packaged",
@@ -2127,11 +2127,11 @@ func TestHelmChartReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmChart) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 		},
diff --git a/controllers/helmrepository_controller.go b/controllers/helmrepository_controller.go
index 6ae7a731..bd4d0077 100644
--- a/controllers/helmrepository_controller.go
+++ b/controllers/helmrepository_controller.go
@@ -292,10 +292,7 @@ func (r *HelmRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *h
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
 			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
-			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
-		}
-		if newObj.Status.Artifact.Digest != "" {
-			annotations[sourcev1.GroupVersion.Group+"/"+eventv1.MetaDigestKey] = newObj.Status.Artifact.Digest
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaDigestKey):   newObj.Status.Artifact.Digest,
 		}
 
 		humanReadableSize := "unknown size"
@@ -303,15 +300,10 @@ func (r *HelmRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *h
 			humanReadableSize = fmt.Sprintf("size %s", units.HumanSize(float64(*size)))
 		}
 
-		var oldChecksum string
-		if oldObj.GetArtifact() != nil {
-			oldChecksum = oldObj.GetArtifact().Checksum
-		}
-
 		message := fmt.Sprintf("stored fetched index of %s from '%s'", humanReadableSize, chartRepo.URL)
 
 		// Notify on new artifact and failure recovery.
-		if oldChecksum != newObj.GetArtifact().Checksum {
+		if !oldObj.GetArtifact().HasDigest(newObj.GetArtifact().Digest) {
 			r.AnnotatedEventf(newObj, annotations, corev1.EventTypeNormal,
 				"NewArtifact", message)
 			ctrl.LoggerFrom(ctx).Info(message)
@@ -471,9 +463,6 @@ func (r *HelmRepositoryReconciler) reconcileSource(ctx context.Context, sp *patc
 	// Early comparison to current Artifact.
 	if curArtifact := obj.GetArtifact(); curArtifact != nil {
 		curDig := digest.Digest(curArtifact.Digest)
-		if curDig == "" {
-			curDig = digest.Digest(sourcev1.TransformLegacyRevision(curArtifact.Checksum))
-		}
 		if curDig.Validate() == nil {
 			// Short-circuit based on the fetched index being an exact match to the
 			// stored Artifact.
@@ -532,7 +521,7 @@ func (r *HelmRepositoryReconciler) reconcileSource(ctx context.Context, sp *patc
 	*artifact = r.Storage.NewArtifactFor(obj.Kind,
 		obj.ObjectMeta.GetObjectMeta(),
 		revision.String(),
-		fmt.Sprintf("index-%s.yaml", revision.Hex()),
+		fmt.Sprintf("index-%s.yaml", revision.Encoded()),
 	)
 
 	return sreconcile.ResultSuccess, nil
@@ -560,7 +549,7 @@ func (r *HelmRepositoryReconciler) reconcileArtifact(ctx context.Context, sp *pa
 		}
 	}()
 
-	if obj.GetArtifact().HasRevision(artifact.Revision) && obj.GetArtifact().HasChecksum(artifact.Checksum) {
+	if obj.GetArtifact().HasRevision(artifact.Revision) && obj.GetArtifact().HasDigest(artifact.Digest) {
 		// Extend TTL of the Index in the cache (if present).
 		if r.Cache != nil {
 			r.Cache.SetExpiration(artifact.Path, r.TTL)
diff --git a/controllers/helmrepository_controller_test.go b/controllers/helmrepository_controller_test.go
index 1a6d7a6b..1dd9e141 100644
--- a/controllers/helmrepository_controller_test.go
+++ b/controllers/helmrepository_controller_test.go
@@ -170,7 +170,7 @@ func TestHelmRepositoryReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/d.txt",
 				Revision: "d",
-				Checksum: "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
+				Digest:   "sha256:18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
 				URL:      testStorage.Hostname + "/reconcile-storage/d.txt",
 				Size:     int64p(int64(len("d"))),
 			},
@@ -218,7 +218,7 @@ func TestHelmRepositoryReconciler_reconcileStorage(t *testing.T) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     "/reconcile-storage/hostname.txt",
 					Revision: "f",
-					Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+					Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 					URL:      "http://outdated.com/reconcile-storage/hostname.txt",
 				}
 				if err := testStorage.MkdirAll(*obj.Status.Artifact); err != nil {
@@ -237,7 +237,7 @@ func TestHelmRepositoryReconciler_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/reconcile-storage/hostname.txt",
 				Revision: "f",
-				Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+				Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 				URL:      testStorage.Hostname + "/reconcile-storage/hostname.txt",
 				Size:     int64p(int64(len("file"))),
 			},
@@ -317,7 +317,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 		server           options
 		url              string
 		secret           *corev1.Secret
-		beforeFunc       func(t *WithT, obj *helmv1.HelmRepository, revision, digest digest.Digest)
+		beforeFunc       func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest)
 		afterFunc        func(t *WithT, obj *helmv1.HelmRepository, artifact sourcev1.Artifact, chartRepo *repository.ChartRepository)
 		want             sreconcile.Result
 		wantErr          bool
@@ -352,7 +352,6 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 			afterFunc: func(t *WithT, obj *helmv1.HelmRepository, artifact sourcev1.Artifact, chartRepo *repository.ChartRepository) {
 				t.Expect(chartRepo.Path).ToNot(BeEmpty())
 				t.Expect(chartRepo.Index).ToNot(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).ToNot(BeEmpty())
 			},
 		},
@@ -372,7 +371,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 					"password": []byte("1234"),
 				},
 			},
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.SecretRef = &meta.LocalObjectReference{Name: "basic-auth"}
 			},
 			want: sreconcile.ResultSuccess,
@@ -383,7 +382,6 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 			afterFunc: func(t *WithT, obj *helmv1.HelmRepository, artifact sourcev1.Artifact, chartRepo *repository.ChartRepository) {
 				t.Expect(chartRepo.Path).ToNot(BeEmpty())
 				t.Expect(chartRepo.Index).ToNot(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).ToNot(BeEmpty())
 			},
 		},
@@ -403,7 +401,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 					"caFile": tlsCA,
 				},
 			},
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.SecretRef = &meta.LocalObjectReference{Name: "ca-file"}
 			},
 			want: sreconcile.ResultSuccess,
@@ -414,7 +412,6 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 			afterFunc: func(t *WithT, obj *helmv1.HelmRepository, artifact sourcev1.Artifact, chartRepo *repository.ChartRepository) {
 				t.Expect(chartRepo.Path).ToNot(BeEmpty())
 				t.Expect(chartRepo.Index).ToNot(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).ToNot(BeEmpty())
 			},
 		},
@@ -434,7 +431,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 					"caFile": []byte("invalid"),
 				},
 			},
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.SecretRef = &meta.LocalObjectReference{Name: "invalid-ca"}
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
 				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
@@ -449,14 +446,13 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				// No repo index due to fetch fail.
 				t.Expect(chartRepo.Path).To(BeEmpty())
 				t.Expect(chartRepo.Index).To(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).To(BeEmpty())
 			},
 		},
 		{
 			name:     "Invalid URL makes FetchFailed=True and returns stalling error",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.URL = strings.ReplaceAll(obj.Spec.URL, "http://", "")
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
 				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
@@ -472,14 +468,13 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				// No repo index due to fetch fail.
 				t.Expect(chartRepo.Path).To(BeEmpty())
 				t.Expect(chartRepo.Index).To(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).To(BeEmpty())
 			},
 		},
 		{
 			name:     "Unsupported scheme makes FetchFailed=True and returns stalling error",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.URL = strings.ReplaceAll(obj.Spec.URL, "http://", "ftp://")
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
 				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
@@ -495,14 +490,13 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				// No repo index due to fetch fail.
 				t.Expect(chartRepo.Path).To(BeEmpty())
 				t.Expect(chartRepo.Index).To(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).To(BeEmpty())
 			},
 		},
 		{
 			name:     "Missing secret returns FetchFailed=True and returns error",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.SecretRef = &meta.LocalObjectReference{Name: "non-existing"}
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
 				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
@@ -517,7 +511,6 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				// No repo index due to fetch fail.
 				t.Expect(chartRepo.Path).To(BeEmpty())
 				t.Expect(chartRepo.Index).To(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).To(BeEmpty())
 			},
 		},
@@ -532,7 +525,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 					"username": []byte("git"),
 				},
 			},
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Spec.SecretRef = &meta.LocalObjectReference{Name: "malformed-basic-auth"}
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
 				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
@@ -547,43 +540,16 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				// No repo index due to fetch fail.
 				t.Expect(chartRepo.Path).To(BeEmpty())
 				t.Expect(chartRepo.Index).To(BeNil())
-				t.Expect(artifact.Checksum).To(BeEmpty())
 				t.Expect(artifact.Revision).To(BeEmpty())
 			},
 		},
 		{
 			name:     "Stored index with same digest and revision",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, digest digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Status.Artifact = &sourcev1.Artifact{
-					Revision: revision.String(),
-					Digest:   digest.String(),
-					Checksum: digest.Hex(),
-				}
-
-				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
-				conditions.MarkUnknown(obj, meta.ReadyCondition, "foo", "bar")
-				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, "foo", "bar")
-			},
-			assertConditions: []metav1.Condition{
-				*conditions.TrueCondition(meta.ReconcilingCondition, meta.ProgressingReason, "foo"),
-				*conditions.UnknownCondition(meta.ReadyCondition, "foo", "bar"),
-			},
-			afterFunc: func(t *WithT, obj *helmv1.HelmRepository, artifact sourcev1.Artifact, chartRepo *repository.ChartRepository) {
-				t.Expect(chartRepo.Path).ToNot(BeEmpty())
-				t.Expect(chartRepo.Index).To(BeNil())
-
-				t.Expect(&artifact).To(BeEquivalentTo(obj.Status.Artifact))
-			},
-			want: sreconcile.ResultSuccess,
-		},
-		{
-			name:     "Stored index with same checksum and (legacy) revision",
-			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, digest digest.Digest) {
-				obj.Status.Artifact = &sourcev1.Artifact{
-					Revision: revision.Hex(),
-					Checksum: digest.Hex(),
+					Revision: rev.String(),
+					Digest:   dig.String(),
 				}
 
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
@@ -605,11 +571,10 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 		{
 			name:     "Stored index with different digest and same revision",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, digest digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Status.Artifact = &sourcev1.Artifact{
-					Revision: revision.String(),
+					Revision: rev.String(),
 					Digest:   "sha256:80bb3dd67c63095d985850459834ea727603727a370079de90d221191d375a86",
-					Checksum: "80bb3dd67c63095d985850459834ea727603727a370079de90d221191d375a86",
 				}
 
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
@@ -626,17 +591,15 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 
 				t.Expect(artifact.Revision).To(Equal(obj.Status.Artifact.Revision))
 				t.Expect(artifact.Digest).ToNot(Equal(obj.Status.Artifact.Digest))
-				t.Expect(artifact.Checksum).ToNot(Equal(obj.Status.Artifact.Checksum))
 			},
 			want: sreconcile.ResultSuccess,
 		},
 		{
 			name:     "Stored index with different revision and digest",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Revision: "80bb3dd67c63095d985850459834ea727603727a370079de90d221191d375a86",
-					Checksum: "80bb3dd67c63095d985850459834ea727603727a370079de90d221191d375a86",
 					Digest:   "sha256:80bb3dd67c63095d985850459834ea727603727a370079de90d221191d375a86",
 				}
 				conditions.MarkReconciling(obj, meta.ProgressingReason, "foo")
@@ -654,14 +617,13 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				t.Expect(artifact.Path).To(Not(BeEmpty()))
 				t.Expect(artifact.Revision).ToNot(Equal(obj.Status.Artifact.Revision))
 				t.Expect(artifact.Digest).ToNot(Equal(obj.Status.Artifact.Digest))
-				t.Expect(artifact.Checksum).ToNot(Equal(obj.Status.Artifact.Checksum))
 			},
 			want: sreconcile.ResultSuccess,
 		},
 		{
 			name:     "Existing artifact makes ArtifactOutdated=True",
 			protocol: "http",
-			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, revision, checksum digest.Digest) {
+			beforeFunc: func(t *WithT, obj *helmv1.HelmRepository, rev, dig digest.Digest) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     "some-path",
 					Revision: "some-rev",
@@ -736,7 +698,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 				builder.WithObjects(secret.DeepCopy())
 			}
 
-			// Calculate the artifact checksum for valid repos configurations.
+			// Calculate the artifact digest for valid repos configurations.
 			clientOpts := []helmgetter.Option{
 				helmgetter.WithURL(server.URL()),
 			}
@@ -745,7 +707,7 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 			validSecret := true
 			if secret != nil {
 				// Extract the client options from secret, ignoring any invalid
-				// value. validSecret is used to determine if the indexChecksum
+				// value. validSecret is used to determine if the index digest
 				// should be calculated below.
 				var cOpts []helmgetter.Option
 				var serr error
@@ -768,18 +730,18 @@ func TestHelmRepositoryReconciler_reconcileSource(t *testing.T) {
 			}
 			g.Expect(err).ToNot(HaveOccurred())
 
-			// NOTE: checksum will be empty in beforeFunc for invalid repo
+			// NOTE: digest will be empty in beforeFunc for invalid repo
 			// configurations as the client can't get the repo.
-			var revision, checksum digest.Digest
+			var rev, dig digest.Digest
 			if validSecret {
 				g.Expect(newChartRepo.CacheIndex()).To(Succeed())
-				checksum = newChartRepo.Digest(intdigest.Canonical)
+				dig = newChartRepo.Digest(intdigest.Canonical)
 
 				g.Expect(newChartRepo.LoadFromPath()).To(Succeed())
-				revision = newChartRepo.Digest(intdigest.Canonical)
+				rev = newChartRepo.Digest(intdigest.Canonical)
 			}
 			if tt.beforeFunc != nil {
-				tt.beforeFunc(g, obj, revision, checksum)
+				tt.beforeFunc(g, obj, rev, dig)
 			}
 
 			r := &HelmRepositoryReconciler{
@@ -942,8 +904,8 @@ func TestHelmRepositoryReconciler_reconcileArtifact(t *testing.T) {
 			chartRepo.Path = cachePath
 
 			artifact := testStorage.NewArtifactFor(obj.Kind, obj, "existing", "foo.tar.gz")
-			// Checksum of the index file calculated by the ChartRepository.
-			artifact.Checksum = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+			// Digest of the index file calculated by the ChartRepository.
+			artifact.Digest = "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
 
 			if tt.beforeFunc != nil {
 				tt.beforeFunc(g, obj, artifact, chartRepo)
@@ -1218,7 +1180,7 @@ func TestHelmRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			newObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: nil}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: nil}
 			},
 			wantEvent: "Normal NewArtifact stored fetched index of unknown size",
 		},
@@ -1227,7 +1189,7 @@ func TestHelmRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			newObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 			},
 			wantEvent: "Normal NewArtifact stored fetched index of size",
 		},
@@ -1236,12 +1198,12 @@ func TestHelmRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal Succeeded stored fetched index of size",
@@ -1251,12 +1213,12 @@ func TestHelmRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.GitOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Checksum: "bbb", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Digest: "bbb", Size: &aSize}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal NewArtifact stored fetched index of size",
@@ -1266,11 +1228,11 @@ func TestHelmRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			newObjBeforeFunc: func(obj *helmv1.HelmRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy", Size: &aSize}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy", Size: &aSize}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 		},
diff --git a/controllers/ocirepository_controller.go b/controllers/ocirepository_controller.go
index c547a6b2..0b6dc2a2 100644
--- a/controllers/ocirepository_controller.go
+++ b/controllers/ocirepository_controller.go
@@ -1139,15 +1139,7 @@ func (r *OCIRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *oc
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
 			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
-			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
-		}
-		if newObj.Status.Artifact.Digest != "" {
-			annotations[sourcev1.GroupVersion.Group+"/"+eventv1.MetaDigestKey] = newObj.Status.Artifact.Digest
-		}
-
-		var oldChecksum string
-		if oldObj.GetArtifact() != nil {
-			oldChecksum = oldObj.GetArtifact().Checksum
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaDigestKey):   newObj.Status.Artifact.Digest,
 		}
 
 		message := fmt.Sprintf("stored artifact with revision '%s' from '%s'", newObj.Status.Artifact.Revision, newObj.Spec.URL)
@@ -1167,7 +1159,7 @@ func (r *OCIRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *oc
 		}
 
 		// Notify on new artifact and failure recovery.
-		if oldChecksum != newObj.GetArtifact().Checksum {
+		if !oldObj.GetArtifact().HasDigest(newObj.GetArtifact().Digest) {
 			r.AnnotatedEventf(newObj, annotations, corev1.EventTypeNormal,
 				"NewArtifact", message)
 			ctrl.LoggerFrom(ctx).Info(message)
diff --git a/controllers/ocirepository_controller_test.go b/controllers/ocirepository_controller_test.go
index e2aa67c1..7f3b172f 100644
--- a/controllers/ocirepository_controller_test.go
+++ b/controllers/ocirepository_controller_test.go
@@ -66,6 +66,7 @@ import (
 
 	sourcev1 "github.com/fluxcd/source-controller/api/v1"
 	ociv1 "github.com/fluxcd/source-controller/api/v1beta2"
+	intdigest "github.com/fluxcd/source-controller/internal/digest"
 	serror "github.com/fluxcd/source-controller/internal/error"
 	sreconcile "github.com/fluxcd/source-controller/internal/reconcile"
 )
@@ -210,9 +211,9 @@ func TestOCIRepository_Reconcile(t *testing.T) {
 				g.Expect(err).ToNot(HaveOccurred())
 				defer f2.Close()
 
-				h := testStorage.Checksum(f2)
-				t.Logf("file %q hash: %q", expectedFile, h)
-				g.Expect(h).To(Equal(af.expectedChecksum))
+				d, err := intdigest.Canonical.FromReader(f2)
+				g.Expect(err).ToNot(HaveOccurred())
+				g.Expect(d.Encoded()).To(Equal(af.expectedChecksum))
 			}
 
 			// Check if the object status is valid
@@ -1483,7 +1484,7 @@ func TestOCIRepository_reconcileArtifact(t *testing.T) {
 				"latest.tar.gz",
 			},
 			afterFunc: func(g *WithT, obj *ociv1.OCIRepository) {
-				g.Expect(obj.Status.Artifact.Checksum).To(Equal("de37cb640bfe6c789f2b131416d259747d5757f7fe5e1d9d48f32d8c30af5934"))
+				g.Expect(obj.Status.Artifact.Digest).To(Equal("sha256:de37cb640bfe6c789f2b131416d259747d5757f7fe5e1d9d48f32d8c30af5934"))
 			},
 			assertConditions: []metav1.Condition{
 				*conditions.TrueCondition(sourcev1.ArtifactInStorageCondition, meta.SucceededReason, "stored artifact for digest"),
@@ -1501,7 +1502,7 @@ func TestOCIRepository_reconcileArtifact(t *testing.T) {
 				"latest.tar.gz",
 			},
 			afterFunc: func(g *WithT, obj *ociv1.OCIRepository) {
-				g.Expect(obj.Status.Artifact.Checksum).To(Equal("05aada03e3e3e96f5f85a8f31548d833974ce862be14942fb3313eef2df861ec"))
+				g.Expect(obj.Status.Artifact.Digest).To(Equal("sha256:05aada03e3e3e96f5f85a8f31548d833974ce862be14942fb3313eef2df861ec"))
 			},
 			assertConditions: []metav1.Condition{
 				*conditions.TrueCondition(sourcev1.ArtifactInStorageCondition, meta.SucceededReason, "stored artifact for digest"),
@@ -1876,7 +1877,7 @@ func TestOCIRepository_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/oci-reconcile-storage/d.txt",
 				Revision: "d",
-				Checksum: "18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
+				Digest:   "sha256:18ac3e7343f016890c510e93f935261169d9e3f565436429830faf0934f4f8e4",
 				URL:      testStorage.Hostname + "/oci-reconcile-storage/d.txt",
 				Size:     int64p(int64(len("d"))),
 			},
@@ -1924,7 +1925,7 @@ func TestOCIRepository_reconcileStorage(t *testing.T) {
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Path:     "/oci-reconcile-storage/hostname.txt",
 					Revision: "f",
-					Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+					Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 					URL:      "http://outdated.com/oci-reconcile-storage/hostname.txt",
 				}
 				if err := testStorage.MkdirAll(*obj.Status.Artifact); err != nil {
@@ -1943,7 +1944,7 @@ func TestOCIRepository_reconcileStorage(t *testing.T) {
 			assertArtifact: &sourcev1.Artifact{
 				Path:     "/oci-reconcile-storage/hostname.txt",
 				Revision: "f",
-				Checksum: "3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
+				Digest:   "sha256:3b9c358f36f0a31b6ad3e14f309c7cf198ac9246e8316f9ce543d5b19ac02b80",
 				URL:      testStorage.Hostname + "/oci-reconcile-storage/hostname.txt",
 				Size:     int64p(int64(len("file"))),
 			},
@@ -2071,7 +2072,7 @@ func TestOCIRepositoryReconciler_notify(t *testing.T) {
 				obj.Spec.URL = "oci://newurl.io"
 				obj.Status.Artifact = &sourcev1.Artifact{
 					Revision: "xxx",
-					Checksum: "yyy",
+					Digest:   "yyy",
 					Metadata: map[string]string{
 						oci.SourceAnnotation:   "https://github.com/stefanprodan/podinfo",
 						oci.RevisionAnnotation: "6.1.8/b3b00fe35424a45d373bf4c7214178bc36fd7872",
@@ -2085,13 +2086,13 @@ func TestOCIRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *ociv1.OCIRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.ReadOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *ociv1.OCIRepository) {
 				obj.Spec.URL = "oci://newurl.io"
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal Succeeded stored artifact with revision 'xxx' from 'oci://newurl.io'",
@@ -2101,13 +2102,13 @@ func TestOCIRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *ociv1.OCIRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.ReadOperationFailedReason, "fail")
 				conditions.MarkFalse(obj, meta.ReadyCondition, meta.FailedReason, "foo")
 			},
 			newObjBeforeFunc: func(obj *ociv1.OCIRepository) {
 				obj.Spec.URL = "oci://newurl.io"
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Checksum: "bbb"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "aaa", Digest: "bbb"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			wantEvent: "Normal NewArtifact stored artifact with revision 'aaa' from 'oci://newurl.io'",
@@ -2117,11 +2118,11 @@ func TestOCIRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultSuccess,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *ociv1.OCIRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 			newObjBeforeFunc: func(obj *ociv1.OCIRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, meta.ReadyCondition, meta.SucceededReason, "ready")
 			},
 		},
@@ -2130,7 +2131,7 @@ func TestOCIRepositoryReconciler_notify(t *testing.T) {
 			res:    sreconcile.ResultRequeue,
 			resErr: nil,
 			oldObjBeforeFunc: func(obj *ociv1.OCIRepository) {
-				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Checksum: "yyy"}
+				obj.Status.Artifact = &sourcev1.Artifact{Revision: "xxx", Digest: "yyy"}
 				conditions.MarkTrue(obj, sourcev1.FetchFailedCondition, sourcev1.URLInvalidReason, "ready")
 			},
 		},
diff --git a/controllers/storage.go b/controllers/storage.go
index a482ac7b..43a78e98 100644
--- a/controllers/storage.go
+++ b/controllers/storage.go
@@ -20,9 +20,7 @@ import (
 	"archive/tar"
 	"compress/gzip"
 	"context"
-	"crypto/sha256"
 	"fmt"
-	"hash"
 	"io"
 	"io/fs"
 	"net/url"
@@ -34,7 +32,6 @@ import (
 
 	securejoin "github.com/cyphar/filepath-securejoin"
 	"github.com/fluxcd/go-git/v5/plumbing/format/gitignore"
-	"github.com/opencontainers/go-digest"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	kerrors "k8s.io/apimachinery/pkg/util/errors"
 
@@ -349,7 +346,7 @@ func SourceIgnoreFilter(ps []gitignore.Pattern, domain []string) ArchiveFileFilt
 // Archive atomically archives the given directory as a tarball to the given v1beta1.Artifact path, excluding
 // directories and any ArchiveFileFilter matches. While archiving, any environment specific data (for example,
 // the user and group name) is stripped from file headers.
-// If successful, it sets the checksum and last update time on the artifact.
+// If successful, it sets the digest and last update time on the artifact.
 func (s *Storage) Archive(artifact *sourcev1.Artifact, dir string, filter ArchiveFileFilter) (err error) {
 	if f, err := os.Stat(dir); os.IsNotExist(err) || !f.IsDir() {
 		return fmt.Errorf("invalid dir path: %s", dir)
@@ -367,12 +364,9 @@ func (s *Storage) Archive(artifact *sourcev1.Artifact, dir string, filter Archiv
 		}
 	}()
 
-	md, err := intdigest.NewMultiDigester(intdigest.Canonical, digest.SHA256)
-	if err != nil {
-		return fmt.Errorf("failed to create digester: %w", err)
-	}
+	d := intdigest.Canonical.Digester()
 	sz := &writeCounter{}
-	mw := io.MultiWriter(md, tf, sz)
+	mw := io.MultiWriter(d.Hash(), tf, sz)
 
 	gw := gzip.NewWriter(mw)
 	tw := tar.NewWriter(gw)
@@ -466,8 +460,7 @@ func (s *Storage) Archive(artifact *sourcev1.Artifact, dir string, filter Archiv
 		return err
 	}
 
-	artifact.Digest = md.Digest(intdigest.Canonical).String()
-	artifact.Checksum = md.Digest(digest.SHA256).Encoded()
+	artifact.Digest = d.Digest().String()
 	artifact.LastUpdateTime = metav1.Now()
 	artifact.Size = &sz.written
 
@@ -475,7 +468,7 @@ func (s *Storage) Archive(artifact *sourcev1.Artifact, dir string, filter Archiv
 }
 
 // AtomicWriteFile atomically writes the io.Reader contents to the v1beta1.Artifact path.
-// If successful, it sets the checksum and last update time on the artifact.
+// If successful, it sets the digest and last update time on the artifact.
 func (s *Storage) AtomicWriteFile(artifact *sourcev1.Artifact, reader io.Reader, mode os.FileMode) (err error) {
 	localPath := s.LocalPath(*artifact)
 	tf, err := os.CreateTemp(filepath.Split(localPath))
@@ -489,12 +482,9 @@ func (s *Storage) AtomicWriteFile(artifact *sourcev1.Artifact, reader io.Reader,
 		}
 	}()
 
-	md, err := intdigest.NewMultiDigester(intdigest.Canonical, digest.SHA256)
-	if err != nil {
-		return fmt.Errorf("failed to create digester: %w", err)
-	}
+	d := intdigest.Canonical.Digester()
 	sz := &writeCounter{}
-	mw := io.MultiWriter(md, tf, sz)
+	mw := io.MultiWriter(tf, d.Hash(), sz)
 
 	if _, err := io.Copy(mw, reader); err != nil {
 		tf.Close()
@@ -512,8 +502,7 @@ func (s *Storage) AtomicWriteFile(artifact *sourcev1.Artifact, reader io.Reader,
 		return err
 	}
 
-	artifact.Digest = md.Digest(intdigest.Canonical).String()
-	artifact.Checksum = md.Digest(digest.SHA256).Encoded()
+	artifact.Digest = d.Digest().String()
 	artifact.LastUpdateTime = metav1.Now()
 	artifact.Size = &sz.written
 
@@ -521,7 +510,7 @@ func (s *Storage) AtomicWriteFile(artifact *sourcev1.Artifact, reader io.Reader,
 }
 
 // Copy atomically copies the io.Reader contents to the v1beta1.Artifact path.
-// If successful, it sets the checksum and last update time on the artifact.
+// If successful, it sets the digest and last update time on the artifact.
 func (s *Storage) Copy(artifact *sourcev1.Artifact, reader io.Reader) (err error) {
 	localPath := s.LocalPath(*artifact)
 	tf, err := os.CreateTemp(filepath.Split(localPath))
@@ -535,12 +524,9 @@ func (s *Storage) Copy(artifact *sourcev1.Artifact, reader io.Reader) (err error
 		}
 	}()
 
-	md, err := intdigest.NewMultiDigester(intdigest.Canonical, digest.SHA256)
-	if err != nil {
-		return fmt.Errorf("failed to create digester: %w", err)
-	}
+	d := intdigest.Canonical.Digester()
 	sz := &writeCounter{}
-	mw := io.MultiWriter(md, tf, sz)
+	mw := io.MultiWriter(tf, d.Hash(), sz)
 
 	if _, err := io.Copy(mw, reader); err != nil {
 		tf.Close()
@@ -554,8 +540,7 @@ func (s *Storage) Copy(artifact *sourcev1.Artifact, reader io.Reader) (err error
 		return err
 	}
 
-	artifact.Digest = md.Digest(intdigest.Canonical).String()
-	artifact.Checksum = md.Digest(digest.SHA256).Encoded()
+	artifact.Digest = d.Digest().String()
 	artifact.LastUpdateTime = metav1.Now()
 	artifact.Size = &sz.written
 
@@ -563,7 +548,7 @@ func (s *Storage) Copy(artifact *sourcev1.Artifact, reader io.Reader) (err error
 }
 
 // CopyFromPath atomically copies the contents of the given path to the path of the v1beta1.Artifact.
-// If successful, the checksum and last update time on the artifact is set.
+// If successful, the digest and last update time on the artifact is set.
 func (s *Storage) CopyFromPath(artifact *sourcev1.Artifact, path string) (err error) {
 	f, err := os.Open(path)
 	if err != nil {
@@ -640,13 +625,6 @@ func (s *Storage) Symlink(artifact sourcev1.Artifact, linkName string) (string,
 	return url, nil
 }
 
-// Checksum returns the SHA256 checksum for the data of the given io.Reader as a string.
-func (s *Storage) Checksum(reader io.Reader) string {
-	h := newHash()
-	_, _ = io.Copy(h, reader)
-	return fmt.Sprintf("%x", h.Sum(nil))
-}
-
 // Lock creates a file lock for the given v1beta1.Artifact.
 func (s *Storage) Lock(artifact sourcev1.Artifact) (unlock func(), err error) {
 	lockFile := s.LocalPath(artifact) + ".lock"
@@ -666,11 +644,6 @@ func (s *Storage) LocalPath(artifact sourcev1.Artifact) string {
 	return path
 }
 
-// newHash returns a new SHA256 hash.
-func newHash() hash.Hash {
-	return sha256.New()
-}
-
 // writecounter is an implementation of io.Writer that only records the number
 // of bytes written.
 type writeCounter struct {
diff --git a/docs/api/v1/source.md b/docs/api/v1/source.md
index 2210f1b6..77e2f5e4 100644
--- a/docs/api/v1/source.md
+++ b/docs/api/v1/source.md
@@ -301,19 +301,6 @@ system. It can be a Git commit SHA, Git tag, a Helm chart version, etc.</p>
 </tr>
 <tr>
 <td>
-<code>checksum</code><br>
-<em>
-string
-</em>
-</td>
-<td>
-<em>(Optional)</em>
-<p>Checksum is the SHA256 checksum of the Artifact file.
-Deprecated: use Artifact.Digest instead.</p>
-</td>
-</tr>
-<tr>
-<td>
 <code>digest</code><br>
 <em>
 string
diff --git a/internal/helm/repository/chart_repository.go b/internal/helm/repository/chart_repository.go
index 3960f18f..3dcd265d 100644
--- a/internal/helm/repository/chart_repository.go
+++ b/internal/helm/repository/chart_repository.go
@@ -282,7 +282,6 @@ func (r *ChartRepository) DownloadChart(chart *repo.ChartVersion) (*bytes.Buffer
 
 // CacheIndex attempts to write the index from the remote into a new temporary file
 // using DownloadIndex, and sets Path and cached.
-// It returns the SHA256 checksum of the downloaded index bytes, or an error.
 // The caller is expected to handle the garbage collection of Path, and to
 // load the Index separately using LoadFromPath if required.
 func (r *ChartRepository) CacheIndex() error {