server@39fb3bb09c67
docker buildx stores the attestations it generates as an extra entry of the index, with the placeholder platform unknown/unknown, describing the variant 77933afcabb9. 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 (23.9 KiB) — no SBOM: the build did not pass --sbom=true.
It belongs to server:0.2, server:0.2.0, 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@sha256:39fb3bb09c671b38d4657be579d32cd847ae362626ecf7f33a127c7a5ee6ca7a- Digest
- 39fb3bb09c671b38d465
- Media type
- application/vnd.oci.image.manifest.v1+json
- Platform
- none — attestation entry (unknown/unknown)
- Total size
- 23.9 KiB
- Pushed
- Oct 6, 2026by
ruohki
| # | Instruction | Digest | Shared | Size |
|---|---|---|---|---|
| 1 | — | 428fc4da757d | unique | 23.9 KiB |
Nothing is attached to this image.
Signatures, SBOMs and provenance show up here once someone who can push attaches them.
{
"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": "sha256:428fc4da757d93449bcd12705157aba1858c8958ba32bbc35038095a00528aed",
"size": 24461,
"annotations": {
"in-toto.io/predicate-type": "https://slsa.dev/provenance/v1"
}
}
],
"subject": {
"mediaType": "application/vnd.oci.image.manifest.v1+json",
"digest": "sha256:77933afcabb987e47ab1c409c780a00deeb0412b131dc935cc9aefbf08d8c4ac",
"size": 1056
}
}