{
  "counterfoil_receipt_version": "1",
  "kind": "ai-inference-attestation",
  "issued_ns": "2026-09-10T19:08:59.580411069+03:00",
  "claim": {
    "model_id": "demo-model",
    "output_label": "sample-attestation",
    "confidence": 0.91,
    "input_fingerprint": "sha3-256:570a314baee42c601cdcaa3467da44b4b026dad1b4f1a244124bd1d0c3225c44",
    "inference_ts": null,
    "meta": {}
  },
  "chain": [
    {
      "seq": 0,
      "stage": "SEED",
      "ts_ms": 1789056539572,
      "payload_hash": "b7f64667857d9cd92c1115605421c3f5cc0bef1b3e10daa2b5f6ec52d8364cac",
      "prev_hash": "",
      "record_hash": "521eedc14434847caa04049c0832c5a7b957f6ebad6f16baf0a607b3258681c9",
      "sator_hmac": null
    },
    {
      "seq": 1,
      "stage": "LOG",
      "ts_ms": 1789056539572,
      "payload_hash": "b8462e515503f59f9b18100d645ae9aa8f2e72d186164cd1e8108c2617b4aeb6",
      "prev_hash": "521eedc14434847caa04049c0832c5a7b957f6ebad6f16baf0a607b3258681c9",
      "record_hash": "601caf72ce1595edd4ab14bbff5356ab369e5b00f303392bc78313c4421fe403",
      "sator_hmac": null
    }
  ],
  "seed_anchor": "b7f64667857d9cd92c1115605421c3f5cc0bef1b3e10daa2b5f6ec52d8364cac",
  "seal": {
    "alg": "ed25519",
    "public_key": "98f18cac17f6e1899daee286838abd5efe8694830c1501c875b4af423f1ce802",
    "key_fingerprint": "be19cba981ce0e02",
    "sealed_field": "chain[-1].record_hash",
    "sealed_value": "601caf72ce1595edd4ab14bbff5356ab369e5b00f303392bc78313c4421fe403",
    "signature": "a9f05b71edebc411db33f2f3f32fad50803a387e78a8d23bbc65dcb46725d31a8a721dbee31cde23b339a254b4c7bd2362c0afde6053a07d332ac1aae235d305"
  },
  "guarantees": {
    "integrity": "SHA3-256 hash chain re-verifies offline with NO secret; any field tamper, reorder, or splice fails.",
    "authenticity": "Ed25519 seal over the terminal record_hash; only the holder of the private key for the embedded public_key could issue it. Establish trust in that key out of band via key_fingerprint."
  },
  "verify_cmd": "python src/counterfoil_receipt.py verify --file <receipt.json>"
}