diff --git a/.chloggen/profiles-otlp-1-8-0.yaml b/.chloggen/profiles-otlp-1-8-0.yaml
index f7a88d1ef9..9f73e70b06 100644
--- a/.chloggen/profiles-otlp-1-8-0.yaml
+++ b/.chloggen/profiles-otlp-1-8-0.yaml
@@ -10,7 +10,7 @@ component: pdata/pprofile
 note: Upgrade the OTLP protobuf definitions to version 1.8.0
 
 # One or more tracking issues or pull requests related to the change
-issues: [13758]
+issues: [13758, 13825]
 
 # (Optional) One or more lines of additional information to render under the primary note.
 # These lines will be padded with 2 spaces and then inserted directly into the document.
diff --git a/internal/cmd/pdatagen/internal/pdata/pprofile_package.go b/internal/cmd/pdatagen/internal/pdata/pprofile_package.go
index 138a38702d..8b958f39df 100644
--- a/internal/cmd/pdatagen/internal/pdata/pprofile_package.go
+++ b/internal/cmd/pdatagen/internal/pdata/pprofile_package.go
@@ -232,13 +232,7 @@ var profile = &messageStruct{
 			fieldName:       "Time",
 			originFieldName: "TimeUnixNano",
 			protoID:         3,
-			returnType: &TypedType{
-				structName:  "Timestamp",
-				packageName: "pcommon",
-				protoType:   proto.TypeUint64,
-				defaultVal:  "0",
-				testVal:     "1234567890",
-			},
+			returnType:      timestampType,
 		},
 		&TypedField{
 			fieldName:       "Duration",
diff --git a/pdata/internal/generated_wrapper_profile.go b/pdata/internal/generated_wrapper_profile.go
index d471731561..c3b3994a7e 100644
--- a/pdata/internal/generated_wrapper_profile.go
+++ b/pdata/internal/generated_wrapper_profile.go
@@ -7,6 +7,7 @@
 package internal
 
 import (
+	"encoding/binary"
 	"fmt"
 	"sync"
 
@@ -214,7 +215,7 @@ func SizeProtoOrigProfile(orig *otlpprofiles.Profile) int {
 		n += 1 + proto.Sov(uint64(l)) + l
 	}
 	if orig.TimeUnixNano != 0 {
-		n += 1 + proto.Sov(uint64(orig.TimeUnixNano))
+		n += 9
 	}
 	if orig.DurationNano != 0 {
 		n += 1 + proto.Sov(uint64(orig.DurationNano))
@@ -273,9 +274,10 @@ func MarshalProtoOrigProfile(orig *otlpprofiles.Profile, buf []byte) int {
 		buf[pos] = 0x12
 	}
 	if orig.TimeUnixNano != 0 {
-		pos = proto.EncodeVarint(buf, pos, uint64(orig.TimeUnixNano))
+		pos -= 8
+		binary.LittleEndian.PutUint64(buf[pos:], uint64(orig.TimeUnixNano))
 		pos--
-		buf[pos] = 0x18
+		buf[pos] = 0x19
 	}
 	if orig.DurationNano != 0 {
 		pos = proto.EncodeVarint(buf, pos, uint64(orig.DurationNano))
@@ -393,11 +395,11 @@ func UnmarshalProtoOrigProfile(orig *otlpprofiles.Profile, buf []byte) error {
 			}
 
 		case 3:
-			if wireType != proto.WireTypeVarint {
+			if wireType != proto.WireTypeI64 {
 				return fmt.Errorf("proto: wrong wireType = %d for field TimeUnixNano", wireType)
 			}
 			var num uint64
-			num, pos, err = proto.ConsumeVarint(buf, pos)
+			num, pos, err = proto.ConsumeI64(buf, pos)
 			if err != nil {
 				return err
 			}
diff --git a/pdata/internal/generated_wrapper_profile_test.go b/pdata/internal/generated_wrapper_profile_test.go
index 606067f2a0..dcc0940d8c 100644
--- a/pdata/internal/generated_wrapper_profile_test.go
+++ b/pdata/internal/generated_wrapper_profile_test.go
@@ -145,7 +145,7 @@ func genTestFailingUnmarshalProtoValuesProfile() map[string][]byte {
 		"Sample/wrong_wire_type":                 {0x14},
 		"Sample/missing_value":                   {0x12},
 		"TimeUnixNano/wrong_wire_type":           {0x1c},
-		"TimeUnixNano/missing_value":             {0x18},
+		"TimeUnixNano/missing_value":             {0x19},
 		"DurationNano/wrong_wire_type":           {0x24},
 		"DurationNano/missing_value":             {0x20},
 		"PeriodType/wrong_wire_type":             {0x2c},
diff --git a/service/internal/graph/obs_test.go b/service/internal/graph/obs_test.go
index d36b53bf75..7f8170b7db 100644
--- a/service/internal/graph/obs_test.go
+++ b/service/internal/graph/obs_test.go
@@ -548,7 +548,7 @@ func TestComponentInstrumentation(t *testing.T) {
 			"otelcol.receiver.produced.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 1271,
+				): 1254,
 			},
 		},
 		attribute.NewSet(
@@ -570,12 +570,12 @@ func TestComponentInstrumentation(t *testing.T) {
 			"otelcol.processor.consumed.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 1271,
+				): 1254,
 			},
 			"otelcol.processor.produced.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 1271,
+				): 1254,
 			},
 		},
 		attribute.NewSet(
@@ -602,17 +602,17 @@ func TestComponentInstrumentation(t *testing.T) {
 			"otelcol.connector.consumed.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 1271,
+				): 1254,
 			},
 			"otelcol.connector.produced.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
 					attribute.String("otelcol.pipeline.id", "profiles/right"),
-				): 668,
+				): 659,
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
 					attribute.String("otelcol.pipeline.id", "profiles/left"),
-				): 603,
+				): 595,
 			},
 		},
 		attribute.NewSet(
@@ -628,7 +628,7 @@ func TestComponentInstrumentation(t *testing.T) {
 			"otelcol.exporter.consumed.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 668,
+				): 659,
 			},
 		},
 		attribute.NewSet(
@@ -644,7 +644,7 @@ func TestComponentInstrumentation(t *testing.T) {
 			"otelcol.exporter.consumed.size": simpleMetric{
 				attribute.NewSet(
 					attribute.String(obsconsumer.ComponentOutcome, "success"),
-				): 603,
+				): 595,
 			},
 		},
 	}