# Time Anchor JSON schema (prep for AIRGAP-TIME-57-001)

Artifact: `docs/airgap/time-anchor-schema.json`

Highlights:
- Required: `anchorTime` (RFC3339), `source` (`roughtime`|`rfc3161`), `format` string, `tokenDigest` (sha256 hex of token bytes).
- Optional: `signatureFingerprint` (hex), `verification.status` (`unknown|passed|failed`) + `reason`.
- No additional properties to keep payload deterministic.

Intended use:
- AirGap Time Guild can embed this in sealed-mode configs and validation endpoints.
- Mirror/OCI timelines can cite the digest + source without needing full token parsing.

Notes:
- Trust roots and final signature fingerprint rules stay TBD; placeholders remain optional to avoid blocking until roots are issued.