diff --git a/api/types/platform_helpers.go b/api/types/platform_helpers.go
new file mode 100644
index 000000000..7e662e9bb
--- /dev/null
+++ b/api/types/platform_helpers.go
@@ -0,0 +1,47 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package types
+
+import oci "github.com/opencontainers/image-spec/specs-go/v1"
+
+// OCIPlatformToProto converts from a slice of OCI [specs.Platform] to a
+// slice of the protobuf definition [Platform].
+func OCIPlatformToProto(platforms []oci.Platform) []*Platform {
+	ap := make([]*Platform, len(platforms))
+	for i := range platforms {
+		ap[i] = &Platform{
+			OS:           platforms[i].OS,
+			Architecture: platforms[i].Architecture,
+			Variant:      platforms[i].Variant,
+		}
+	}
+	return ap
+}
+
+// OCIPlatformFromProto converts a slice of the protobuf definition [Platform]
+// to a slice of OCI [specs.Platform].
+func OCIPlatformFromProto(platforms []*Platform) []oci.Platform {
+	op := make([]oci.Platform, len(platforms))
+	for i := range platforms {
+		op[i] = oci.Platform{
+			OS:           platforms[i].OS,
+			Architecture: platforms[i].Architecture,
+			Variant:      platforms[i].Variant,
+		}
+	}
+	return op
+}
diff --git a/pkg/transfer/archive/exporter.go b/pkg/transfer/archive/exporter.go
index d71f75c4a..59ee899db 100644
--- a/pkg/transfer/archive/exporter.go
+++ b/pkg/transfer/archive/exporter.go
@@ -156,7 +156,7 @@ func (iis *ImageExportStream) UnmarshalAny(ctx context.Context, sm streaming.Str
 		return err
 	}
 
-	specified := platforms.FromProto(s.Platforms)
+	specified := types.OCIPlatformFromProto(s.Platforms)
 	iis.stream = tstreaming.WriteByteStream(ctx, stream)
 	iis.mediaType = s.MediaType
 	iis.platforms = specified
diff --git a/pkg/transfer/image/imagestore.go b/pkg/transfer/image/imagestore.go
index 975fc7f25..88d115d41 100644
--- a/pkg/transfer/image/imagestore.go
+++ b/pkg/transfer/image/imagestore.go
@@ -363,7 +363,7 @@ func (is *Store) MarshalAny(context.Context, streaming.StreamCreator) (typeurl.A
 		Labels:          is.imageLabels,
 		ManifestLimit:   uint32(is.manifestLimit),
 		AllMetadata:     is.allMetadata,
-		Platforms:       platforms.ToProto(is.platforms),
+		Platforms:       types.OCIPlatformToProto(is.platforms),
 		ExtraReferences: referencesToProto(is.extraReferences),
 		Unpacks:         unpackToProto(is.unpacks),
 	}
@@ -380,7 +380,7 @@ func (is *Store) UnmarshalAny(ctx context.Context, sm streaming.StreamGetter, a
 	is.imageLabels = s.Labels
 	is.manifestLimit = int(s.ManifestLimit)
 	is.allMetadata = s.AllMetadata
-	is.platforms = platforms.FromProto(s.Platforms)
+	is.platforms = types.OCIPlatformFromProto(s.Platforms)
 	is.extraReferences = referencesFromProto(s.ExtraReferences)
 	is.unpacks = unpackFromProto(s.Unpacks)
 
diff --git a/platforms/platforms.go b/platforms/platforms.go
index afcc867bb..43e4ad3d8 100644
--- a/platforms/platforms.go
+++ b/platforms/platforms.go
@@ -118,8 +118,6 @@ import (
 	"strings"
 
 	specs "github.com/opencontainers/image-spec/specs-go/v1"
-
-	"github.com/containerd/containerd/api/types"
 )
 
 var (
@@ -290,31 +288,3 @@ func Normalize(platform specs.Platform) specs.Platform {
 
 	return platform
 }
-
-// ToProto converts from a slice of [Platform] to a slice of
-// the protobuf definition [types.Platform].
-func ToProto(platforms []Platform) []*types.Platform {
-	ap := make([]*types.Platform, len(platforms))
-	for i := range platforms {
-		ap[i] = &types.Platform{
-			OS:           platforms[i].OS,
-			Architecture: platforms[i].Architecture,
-			Variant:      platforms[i].Variant,
-		}
-	}
-	return ap
-}
-
-// FromProto converts a slice of the protobuf definition [types.Platform]
-// to a slice of [Platform].
-func FromProto(platforms []*types.Platform) []specs.Platform {
-	op := make([]specs.Platform, len(platforms))
-	for i := range platforms {
-		op[i] = specs.Platform{
-			OS:           platforms[i].OS,
-			Architecture: platforms[i].Architecture,
-			Variant:      platforms[i].Variant,
-		}
-	}
-	return op
-}
diff --git a/services/introspection/local.go b/services/introspection/local.go
index f1e1853cf..5ed328b40 100644
--- a/services/introspection/local.go
+++ b/services/introspection/local.go
@@ -24,9 +24,9 @@ import (
 	"sync"
 
 	api "github.com/containerd/containerd/api/services/introspection/v1"
+	"github.com/containerd/containerd/api/types"
 	"github.com/containerd/containerd/errdefs"
 	"github.com/containerd/containerd/filters"
-	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/containerd/plugin"
 	ptypes "github.com/containerd/containerd/protobuf/types"
 	"github.com/containerd/containerd/services"
@@ -222,7 +222,7 @@ func pluginsToPB(plugins []*plugin.Plugin) []*api.Plugin {
 			Type:         p.Registration.Type.String(),
 			ID:           p.Registration.ID,
 			Requires:     requires,
-			Platforms:    platforms.ToProto(p.Meta.Platforms),
+			Platforms:    types.OCIPlatformToProto(p.Meta.Platforms),
 			Capabilities: p.Meta.Capabilities,
 			Exports:      p.Meta.Exports,
 			InitErr:      initErr,