{
  "harness_run": "harness-2026-05-04-A",
  "step": 7,
  "rail": "SMSH",
  "label": "SIGNED SAMPLE ARTIFACT",
  "timestamp": "2026-05-04T19:00:00-07:00",
  "body": {
    "lineage_hash_hex": "d244358ce30a45f198bc5e8080126ee8e942b30459f8f83961486352cb39eb66",
    "payload_hash_hex": "c13d9febddfa70c5efff88031525f43a677b29b5ac9ad89c12e93d05397b1c40",
    "smsh_stamp_id": "smsh-stamp-demo-a-13",
    "lineage_position": 13,
    "smsh_root_hex": "3d4e56930c00d6d62ef99e194e2569f256103daaa284ea4257c48b5ebff6b465",
    "envelope_scheme": "smsh.standard.v1",
    "retention_profile": "pro_3y",
    "viewkey_grants": [],
    "_real_endpoint": "POST https://hive-passport.onrender.com/v1/hktn/<hktn>/stamp (LIVE)",
    "_sample_reason": "Real stamp endpoint mints to live registry; demo uses deterministic sample so replay-bundle is reproducible."
  },
  "signature": {
    "ed25519_sig_b64u_sample": "F2-_ZfbER8UI8I2HwVxOtXWAx4W0DXqOKMtoNc-YfugXb79l9sRHxQjwjYfBXE61dYDHhbQNeo4oy2g1z5h-6A",
    "issuer": "did:hive:hive-passport",
    "issuer_pubkey_b64u": "nxCpCWMw0EIYl5I37xFoSnaYNApu9nEZMNr370wfZgw",
    "alg": "Ed25519",
    "payload_canonical_sha256_hex": "176fbf65f6c447c508f08d87c15c4eb57580c785b40d7a8e28cb6835cf987ee8",
    "_label": "SIGNED SAMPLE \u2014 deterministic placeholder. Replace with real signature from POST https://hive-passport.onrender.com/v1/sign in production. Verify the canonical-hash + payload chain offline at /verify."
  },
  "self_sha256_hex": "d797aef98dbabffa89e2da8544037a182891b916664297fe1348bc213e66995b"
}