{
  "$schema": "https://lunarasociety.com/.well-known/assertion.schema.json",
  "assertion": {
    "version": "lunara-assertion-1",
    "type": "document-integrity",
    "issuer": "https://lunarasociety.com",
    "subject": "https://lunarasociety.com/corpus/index.json",
    "statement": "Lunara Society published this corpus index — the list of machine-readable documents this institution stands behind.",
    "evidence": "verified",
    "claims": {
      "digest": {
        "alg": "sha-256",
        "encoding": "base64url",
        "value": "AqjVsOS2fXKnvXO84Xv6oIXRGae7CYIpd5H9VODH7N0"
      },
      "bytes": 5087,
      "media_type": "application/json",
      "document_version": "1.0.0"
    },
    "issued_at": "2026-08-24T18:44:52.602Z",
    "expires_at": "2027-08-24T18:44:52.602Z",
    "key_id": "luna-2026-Uju42vez3TYJh_2a"
  },
  "signature": {
    "alg": "EdDSA",
    "curve": "Ed25519",
    "key_id": "luna-2026-Uju42vez3TYJh_2a",
    "keys": "https://lunarasociety.com/.well-known/keys.json",
    "value": "wfP1l1dP4oykB-cAIPmBT5G62S2Ef0lrvwmKtKRYZI8juCEaDO1qtEOI5gllUdWC2eSB5yyAwi7eLZdEukuPDw"
  },
  "how_to_verify": "Take assertion, serialise it as RFC 8785 canonical JSON, and verify signature.value as Ed25519 over those bytes using the key whose kid is signature.key_id from https://lunarasociety.com/.well-known/keys.json. Then SHA-256 the subject document as served and compare it to assertion.claims.digest.value. Both must hold. Nothing needs to be fetched from this institution to check the maths."
}