Card snapshot

This is a frozen copy of the agent's agent-card.json as we observed it at the timestamp above. We capture a new snapshot every time the card's content hash changes. Useful for: forensic drift analysis, verifying downstream callers see the right version, reproducing routing decisions made historically.

{
  "protocolVersion": "0.3.0",
  "name": "Markovian Provenance",
  "description": "Bitcoin-anchored provenance for agent outputs. Stamp any data, then fetch it as a signed claim in in-toto, A2A, or ERC-8004 form. Provenance, not truth.",
  "url": "https://api.quantsynth.net/mcp/",
  "version": "1.0.0",
  "skills": [
    {
      "id": "stamp",
      "name": "Stamp",
      "description": "Commit any data to the Markovian chain; get a tamper-evident provenance receipt."
    },
    {
      "id": "verify",
      "name": "Verify",
      "description": "Independently verify a stamp by its merkle_root, no key or account."
    },
    {
      "id": "trace",
      "name": "Trace",
      "description": "Walk a stamp's derived_from provenance lineage."
    },
    {
      "id": "claim",
      "name": "Claim",
      "description": "Fetch any stamp as a signed claim in in-toto DSSE, A2A, and ERC-8004 form."
    }
  ],
  "capabilities": {
    "extensions": [
      {
        "uri": "https://markovianprotocol.com/ext/provenance/v1",
        "description": "Markovian Bitcoin-anchored provenance service.",
        "params": {
          "issuer": "did:web:api.quantsynth.net",
          "did": "did:web:api.quantsynth.net",
          "claimEndpoint": "https://api.quantsynth.net/claim/{merkle_root}",
          "verifyEndpoint": "https://api.quantsynth.net/verify/{merkle_root}",
          "credentialEndpoint": "https://api.quantsynth.net/credential",
          "hashes": [
            "sha256",
            "keccak256"
          ],
          "anchoring": {
            "stamp": "OpenTimestamps (per-item Bitcoin timestamp)",
            "anchor": "Markovian chain root committed to Bitcoin (protocol OP_RETURN)",
            "note": "stamp and anchor are two distinct Bitcoin functions; a stamp is not the anchor."
          },
          "canonicalization": "RFC 8785 (JCS)",
          "dialects": [
            "in-toto DSSE",
            "A2A Agent Card",
            "ERC-8004 evidence"
          ],
          "assertion": "provenance (timing + integrity), not truth."
        }
      }
    ]
  },
  "provider": {
    "organization": "Markovian Protocol",
    "url": "https://markovianprotocol.com"
  },
  "signatures": [
    {
      "protected": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6YXBpLnF1YW50c3ludGgubmV0I2tleS0xIiwidHlwIjoiSldTIn0",
      "signature": "99w92JobTpS3Vh_LviR5YaBs-HS5GQUdYAa1UOHR74pFSv0yIbkPGNYyFL80buAM2hdf9qAeNt8zONCuFXMeAg"
    }
  ]
}