diff --git a/go.mod b/go.mod
index 35971e63..747de6eb 100644
--- a/go.mod
+++ b/go.mod
@@ -4,6 +4,6 @@ go 1.19
 
 require (
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.1.0-rc.3
+	github.com/opencontainers/image-spec v1.1.0-rc4
 	golang.org/x/sync v0.3.0
 )
diff --git a/go.sum b/go.sum
index bc26d7f8..e391513b 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,6 @@
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
-github.com/opencontainers/image-spec v1.1.0-rc.3 h1:GT9Xon8YrLxz6N7sErbN81V8J4lOQKGUZQmI3ioviqU=
-github.com/opencontainers/image-spec v1.1.0-rc.3/go.mod h1:X4pATf0uXsnn3g5aiGIsVnJBR4mxhKzfwmvK/B2NTm8=
+github.com/opencontainers/image-spec v1.1.0-rc4 h1:oOxKUJWnFC4YGHCCMNql1x4YaDfYBTS5Y4x/Cgeo1E0=
+github.com/opencontainers/image-spec v1.1.0-rc4/go.mod h1:X4pATf0uXsnn3g5aiGIsVnJBR4mxhKzfwmvK/B2NTm8=
 golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
 golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
diff --git a/internal/spec/artifact.go b/internal/spec/artifact.go
index 8aa8e79e..7f801fd9 100644
--- a/internal/spec/artifact.go
+++ b/internal/spec/artifact.go
@@ -17,8 +17,16 @@ package spec
 
 import ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 
-// AnnotationReferrersFiltersApplied is the annotation key for the comma separated list of filters applied by the registry in the referrers listing.
-const AnnotationReferrersFiltersApplied = "org.opencontainers.referrers.filtersApplied"
+const (
+	// AnnotationArtifactCreated is the annotation key for the date and time on which the artifact was built, conforming to RFC 3339.
+	AnnotationArtifactCreated = "org.opencontainers.artifact.created"
+
+	// AnnotationArtifactDescription is the annotation key for the human readable description for the artifact.
+	AnnotationArtifactDescription = "org.opencontainers.artifact.description"
+
+	// AnnotationReferrersFiltersApplied is the annotation key for the comma separated list of filters applied by the registry in the referrers listing.
+	AnnotationReferrersFiltersApplied = "org.opencontainers.referrers.filtersApplied"
+)
 
 // MediaTypeArtifactManifest specifies the media type for a content descriptor.
 const MediaTypeArtifactManifest = "application/vnd.oci.artifact.manifest.v1+json"
diff --git a/pack.go b/pack.go
index 81fc12ca..872afa51 100644
--- a/pack.go
+++ b/pack.go
@@ -90,7 +90,7 @@ func packArtifact(ctx context.Context, pusher content.Pusher, artifactType strin
 		artifactType = MediaTypeUnknownArtifact
 	}
 
-	annotations, err := ensureAnnotationCreated(opts.ManifestAnnotations, ocispec.AnnotationArtifactCreated)
+	annotations, err := ensureAnnotationCreated(opts.ManifestAnnotations, spec.AnnotationArtifactCreated)
 	if err != nil {
 		return ocispec.Descriptor{}, err
 	}
diff --git a/pack_test.go b/pack_test.go
index 582ef128..505f1b79 100644
--- a/pack_test.go
+++ b/pack_test.go
@@ -77,9 +77,9 @@ func Test_Pack_Default(t *testing.T) {
 	}
 
 	// test created time annotation
-	createdTime, ok := manifest.Annotations[ocispec.AnnotationArtifactCreated]
+	createdTime, ok := manifest.Annotations[spec.AnnotationArtifactCreated]
 	if !ok {
-		t.Errorf("Annotation %s = %v, want %v", ocispec.AnnotationArtifactCreated, ok, true)
+		t.Errorf("Annotation %s = %v, want %v", spec.AnnotationArtifactCreated, ok, true)
 	}
 	_, err = time.Parse(time.RFC3339, createdTime)
 	if err != nil {
@@ -98,7 +98,7 @@ func Test_Pack_WithOptions(t *testing.T) {
 
 	artifactType := "application/vnd.test"
 	annotations := map[string]string{
-		ocispec.AnnotationArtifactCreated: "2000-01-01T00:00:00Z",
+		spec.AnnotationArtifactCreated: "2000-01-01T00:00:00Z",
 	}
 	subjectManifest := []byte(`{"layers":[]}`)
 	subjectDesc := ocispec.Descriptor{
@@ -216,7 +216,7 @@ func Test_Pack_InvalidDateTimeFormat(t *testing.T) {
 	ctx := context.Background()
 	opts := PackOptions{
 		ManifestAnnotations: map[string]string{
-			ocispec.AnnotationArtifactCreated: "2000/01/01 00:00:00",
+			spec.AnnotationArtifactCreated: "2000/01/01 00:00:00",
 		},
 	}
 	artifactType := "application/vnd.test"