Evidence row 3212

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://notary.forgemesh.io/api/notarize"
    ]
  ],
  "name": "notary.forgemesh.io/api/notarize",
  "owner_address": "0x814efe784709f5bf8df47735d87602b01030e5d2",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x814EfE784709f5bF8dF47735D87602B01030e5D2",
        "scheme": "exact"
      }
    ],
    "description": "Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "client_timestamp": "2026-07-03T12:00:00Z",
              "model_id": "openai/gpt-5",
              "prompt": "What is 2+2?",
              "response": "4"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "algorithm": "ed25519",
              "anchor": {
                "status": "pending"
              },
              "attestation_id": "att_0123456789abcdef01234567",
              "client_timestamp": "2026-07-03T12:00:00Z",
              "content_hash": "9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
              "model_id": "openai/gpt-5",
              "notarized_at": "2026-07-03T12:00:01.000Z",
              "payload_stored": false,
              "receipt_token": "private-receipt-token",
              "receipt_url": "https://notary.forgemesh.io/api/receipt/att_0123456789abcdef01234567",
              "signature": "base64-ed25519-signature",
              "signer_pubkey": "base64-ed25519-public-key"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "client_timestamp": {
                      "description": "ISO-8601 time the inference ran (optional; included in the content hash)",
                      "type": "string"
                    },
                    "metadata": {
                      "description": "Optional caller metadata, <= 4 KB — accepted but NOT persisted or hashed (reserved for future opt-in retention)",
                      "type": "object"
                    },
                    "model_id": {
                      "description": "Model identifier, e.g. openai/gpt-5 or claude-fable-5",
                      "type": "string"
                    },
                    "prompt": {
                      "description": "Exact prompt/input sent to the model",
                      "type": "string"
                    },
                    "response": {
                      "description": "Exact model output being notarized",
                      "type": "string"
                    }
                  },
                  "required": [
                    "prompt",
                    "response",
                    "model_id"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "algorithm": {
                      "type": "string"
                    },
                    "anchor": {
                      "properties": {
                        "status": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "attestation_id": {
                      "type": "string"
                    },
                    "client_timestamp": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "content_hash": {
                      "description": "sha256 hex over canonical {prompt, response, model_id, client_timestamp}",
                      "type": "string"
                    },
                    "model_id": {
                      "type": "string"
                    },
                    "notarized_at": {
                      "type": "string"
                    },
                    "payload_stored": {
                      "description": "false by default: prompt/response/metadata are not persisted",
                      "type": "boolean"
                    },
                    "receipt_token": {
                      "description": "Private receipt token; payload is not stored by default",
                      "type": "string"
                    },
                    "receipt_url": {
                      "type": "string"
                    },
                    "signature": {
                      "description": "base64 Ed25519 signature by the notary key",
                      "type": "string"
                    },
                    "signer_pubkey": {
                      "description": "base64 raw Ed25519 public key",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "payment-identifier": {
        "info": {
          "required": false
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "id": {
              "maxLength": 128,
              "minLength": 16,
              "pattern": "^[a-zA-Z0-9_-]+$",
              "type": "string"
            },
            "required": {
              "type": "boolean"
            }
          },
          "required": [
            "required"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T02:26:28.399Z",
    "quality": {
      "l30DaysTotalCalls": 20,
      "l30DaysUniquePayers": 11,
      "lastCalledAt": "2026-10-26T02:26:28.151Z"
    },
    "resource": "https://notary.forgemesh.io/api/notarize",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Notarize AI output: a signed Ed25519 attestation of the model response plus sha256 content hash, receipt token, and Merkle anchor status for one AI inference — a cryptographic receipt for inference that lets you prove an AI said X and verify model output authenticity, checkable free by anyone, anytime."
}

What the leaf hashes

{"body":"7a09fd9c0229da36001454dcf8082291d6110406e4283845e0e80eafe8c2af9b","id":3212,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025271821204,"prev":null,"subject":"x402_bazaar:https://notary.forgemesh.io/api/notarize","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xba7af18661f4cccb6c8734bb79a03fc9e84159e01f007b9520c4c423596eae93
2. 0x32ad3d4f6146ed10a3b8e112315c1d12ed09ada20e754fdcf979a7d45f13de0b
3. 0x0c7591f15e2355d80b23fabf764c4f85b792941adf5a95472bced62570cdc29f
4. 0xa1d52f127492b99b7642249298d0c1a071f9d0334a0f61fb3cbd12ade54a2e79
5. 0xd12aa5c133062b94b82690195b06be3db95a09b6c40cabe3623650fc0210ba56
6. 0xad2379ad5c56302b562b5a9881bd0524c076c5992ea267df3b0a3c4fda366fb8
7. 0xdb11947467b64a81252fd5725d1fb437a6f013f37663affee3eef76f741b7e40
8. 0x939ce1b22fb7c6635e6806484d318d30a97eb76037d9a7bb80f55b70d08593ce
9. 0xa3b937c188a609b7564c8f2de88764789b220f44e51b26391dee764dc7bd3a77
10. 0x5c670c369e4461ebb756b60e4a7c2b61bacd5db31fcc3315d727acb3845358d5
11. 0xd2fc7e774aa4a9259d0eb5e076abdaa36417d3853be0f8ff34d37acaa77db477
12. 0x1a61f9ab4a9304db8146c466be341271a345718ebf06b718e0f0dd9f347d2fbd
13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae