{
  "payload": {
    "credential": "StillOS Prediction Track Record",
    "issuer": "StillOS Agent Notary",
    "claim_type": "calibration",
    "statement": "Ed25519-signed, hash-committed record of settled probabilistic predictions. Demonstrates calibration reliability; does not claim to beat market prices.",
    "committed_predictions": 1303,
    "settled_predictions": 1129,
    "mean_brier": 0.00165,
    "brier_benchmark": {
      "coin_flip": 0.25,
      "excellent": 0.05
    },
    "near_certainty_calls": 685,
    "near_certainty_correct": 685,
    "near_certainty_accuracy": 1,
    "categories": {
      "political": 221,
      "general": 73,
      "financial": 226,
      "entertainment": 390,
      "geopolitical": 206,
      "weather": 11,
      "environmental_enforcement": 2
    },
    "window": {
      "first_committed": "2026-06-21T04:31:41.597Z",
      "last_settled": "2026-06-28T19:36:47.660Z"
    },
    "integrity": "each source row carries committed_at + content hash; ledger is append-only",
    "generated_at": "2026-07-16T03:22:25.569Z"
  },
  "canonical_field_order": [
    "brier_benchmark",
    "categories",
    "claim_type",
    "committed_predictions",
    "credential",
    "generated_at",
    "integrity",
    "issuer",
    "mean_brier",
    "near_certainty_accuracy",
    "near_certainty_calls",
    "near_certainty_correct",
    "settled_predictions",
    "statement",
    "window"
  ],
  "sha256": "844acb6a6574ad04f871659026794577e3ec0c9bff6e9afb9f4cc3a17cb71f66",
  "ed25519_signature": "m7sgC9pBUQ0RlBavzGOyEtd1Cob17Ql/iKKH+biQNNGhlRDEwZKJGd/Fl+92ZbZeFpKicgmUwGh2Myqb/v3RBA==",
  "public_key": "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEAsFIB67A7w7j7oLHjuJeErxMpq2VTZyUXD2785nbgqMM=\n-----END PUBLIC KEY-----\n",
  "notary_fingerprint": "921e3af51250a1f5",
  "how_to_verify": "Recompute canonical JSON (keys sorted) of payload, then crypto.verify(null, canonical, public_key, base64decode(ed25519_signature))."
}