server@0ad7be95ce1b

This is not an image: it is a BuildKit attestation entry of a multi-arch index.

docker buildx stores the attestations it generates as an extra entry of the index, with the placeholder platform unknown/unknown, describing the variant 9d95448dbe40. It appears whenever a build records provenance — on by default since Docker 24 / buildx 0.11 — or an SBOM (--sbom=true); images built with plain docker build or with --provenance=false have no such entry. docker pull never fetches it by itself; docker buildx imagetools inspect and docker sbom read it.

This entry contains: SLSA provenance v1 (27.0 KiB) — no SBOM: the build did not pass --sbom=true.

It belongs to server:main-46db745, so it cannot be deleted on its own: removing it would break that index. Delete the tag or the index and the next prune untagged run (or a retention policy) removes this entry; garbage collection reclaims its bytes.

To build without attestation entries: docker buildx build --provenance=false --sbom=false …

docker pull chicor.ee/tund/server@sha256:0ad7be95ce1b0ae7168ef24296aabc8afb871e06c605ca9d82a8a7580d22b784

Digest: 0ad7be95ce1b0ae7168e
Media type: application/vnd.oci.image.manifest.v1+json
Platform: none — attestation entry (unknown/unknown)
Total size: 27.0 KiB
Pushed: Oct 6, 2026byruohki

Cargo plan

1 layer27.0 KiB

#	Instruction	Digest	Shared	Size
1	`—`	52bb3b6ed799	unique	27.0 KiB

{
  "schemaVersion": 2,
  "mediaType": "application/vnd.oci.image.manifest.v1+json",
  "artifactType": "application/vnd.docker.attestation.manifest.v1+json",
  "config": {
    "mediaType": "application/vnd.oci.empty.v1+json",
    "digest": "sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a",
    "size": 2,
    "data": "e30="
  },
  "layers": [
    {
      "mediaType": "application/vnd.in-toto+json",
      "digest": "sha256:52bb3b6ed79911d554a2cb94db094274e43d0c356bd8f9721dfe305aa381961f",
      "size": 27642,
      "annotations": {
        "in-toto.io/predicate-type": "https://slsa.dev/provenance/v1"
      }
    }
  ],
  "subject": {
    "mediaType": "application/vnd.oci.image.manifest.v1+json",
    "digest": "sha256:9d95448dbe40337a00bc7e72e0ac8ea26bd0195fe9ba1761c3f177a2a1582035",
    "size": 1056
  }
}