Evidence row 75045

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://factstamp.agentrails.workers.dev/citation"
    ]
  ],
  "name": "factstamp.agentrails.workers.dev/citation",
  "owner_address": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "description": "Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, ambiguous, retracted, not_found, unknown.",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "20000",
        "maxTimeoutSeconds": 300,
        "mimeType": "application/json",
        "network": "eip155:8453",
        "payTo": "0xc3bcd24a2b350cc73b8516b2a0539a323b42cc32",
        "resource": "https://factstamp.agentrails.workers.dev/citation",
        "scheme": "exact"
      }
    ],
    "description": "Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, ambiguous, retracted, not_found, unknown.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "query": "10.1038/nature12373"
            },
            "bodyType": "application/json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "kind": "doi",
              "query": "10.1038/nature12373",
              "record": {
                "authors": [
                  "G. Kucsko",
                  "P. C. Maurer",
                  "N. Y. Yao"
                ],
                "container": "Nature",
                "doi": "10.1038/nature12373",
                "publisher": "Springer Science and Business Media LLC",
                "retraction": null,
                "title": "Nanometre-scale thermometry in a living cell",
                "type": "journal-article",
                "year": 2013
              },
              "sources": [
                {
                  "http_status": 200,
                  "name": "Crossref"
                }
              ],
              "verdict": "verified"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "input": {
              "additionalProperties": true,
              "properties": {
                "body": {
                  "type": "object"
                },
                "bodyType": {
                  "const": "application/json"
                },
                "method": {
                  "const": "POST"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type",
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input",
            "output"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-09T11:55:01.15Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-09T11:55:00.634Z"
    },
    "resource": "https://factstamp.agentrails.workers.dev/citation",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check a citation before repeating it. Give a DOI, an arXiv ID or a paper title; the answer says whether the work exists, what it is (title, authors, year, container) and whether it has been retracted. A title that is absent from both Crossref and arXiv returns not_found, and a near title match is never reported as verified. Cited to the source record with its retrieval time. Verdicts: verified, ambiguous, retracted, not_found, unknown."
}

What the leaf hashes

{"body":"5661a9dfa573fe18a903704341e4100a73728fa81a0adb95e96fbf3c3f333cc1","id":75045,"kind":"listing","method":"baseline/1","observed_us":1793025489984093,"prev":null,"subject":"x402_bazaar:https://factstamp.agentrails.workers.dev/citation","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. 0xfc87ac32312689a84b5fb7994ed2134a08b352d3713018829090d742460aa0df
2. 0x697fe5de8acdfc52961d5f64bc32812537cd7325007d3420ed71db0041d32e84
3. 0x85938b090a8cdbaf9f880bf0eb339e0475024b1fa85f07280d844087f40ac459
4. 0xc33a0da2c43797771fab603e3f25c6dd9d6cb612058452477e708c06a4ed9bea
5. 0xc420bfd2f4e8afb572e62d32e267f92b0a2e4c955f51c3b9cad727ce79908e4d
6. 0x497e3f5c48e9cf692470d7ac96cf7622436fb29b602b52e625b4b67712813e02
7. 0x4e28c2640d32f998db493e0c0aec714ac98cc1565f17f0e843856e7579ea8add
8. 0x8db6b774b2dfc8c1179ffa99ffbed3aa8c9d3a16517531c3539e3c34842666ce
9. 0x136ba120fe1689e63adfe97318f101db112c5f8bc417737f0dd8694087327526
10. 0x3a8d3d4169cff276684d88a4f127811b670ead57557bd0903bd3af277772b2c1
11. 0x51bc8fcd224b36d2c60fa49f46f383ee8328191b9e73209ce8018f2612c3d42f
12. 0xf8173f36b7a27e1bb0f6961a49501bba1d99349c5e11449d0d557fbaa910be0a
13. 0xbee644d57738676bfb20eb90d6021f364bf883a8d54f8d17e9dc4749b4074c3d
14. 0x44945ea9ad8b24e723ad5a8fd6d014024a49531783f74ff9229c2ab6930e84c8
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae