Evidence row 2199159

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://market.561.group/v1/book-record"
    ]
  ],
  "name": "book-record",
  "owner_address": "0x32886f6f361c1d570255c2762967a2e41d0e9b1a",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x32886F6F361C1d570255c2762967A2e41D0E9B1a",
        "scheme": "exact"
      }
    ],
    "description": "Validate one ISBN checksum and return its Open Library edition, work and author records projected into one sourced CSL-JSON book item; invalid or absent ISBNs return an explicit refusal. The FOUR truth reading is true when found and neither on refusal.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "isbn": "9780670654000"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "read": "true",
              "record": {
                "ISBN": "9780670654000",
                "URL": "https://openlibrary.org/isbn/9780670654000",
                "author": [
                  {
                    "family": "Keats",
                    "given": "Ezra Jack"
                  }
                ],
                "id": "9780670654000",
                "issued": {
                  "date-parts": [
                    [
                      1962
                    ]
                  ]
                },
                "note": "Open Library sources: https://openlibrary.org/isbn/9780670654000.json, https://openlibrary.org/works/OL45804W.json, https://openlibrary.org/authors/OL22242A.json",
                "number-of-pages": 32,
                "publisher": "Viking Press",
                "title": "The Snowy Day",
                "type": "book"
              },
              "sources": [
                "https://openlibrary.org/isbn/9780670654000.json",
                "https://openlibrary.org/works/OL45804W.json",
                "https://openlibrary.org/authors/OL22242A.json"
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "isbn": {
                      "description": "An ISBN-10 or ISBN-13, with or without hyphens.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "isbn"
                  ],
                  "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": {
                    "read": {
                      "enum": [
                        "neither",
                        "true",
                        "false",
                        "both"
                      ]
                    },
                    "record": {
                      "description": "The normalized CSL-JSON book record when found.",
                      "type": "object"
                    },
                    "refusal": {
                      "description": "The invalid-checksum or not-found refusal when no record can be returned.",
                      "type": "object"
                    },
                    "sources": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    }
                  },
                  "required": [
                    "sources",
                    "read"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "sign-in-with-x": {
        "info": {
          "domain": "market.561.group",
          "expirationTime": "2026-10-24T13:23:40.426Z",
          "issuedAt": "2026-10-24T13:18:40.426Z",
          "nonce": "f99b1141de8448dcf8f1c37a0bcd9b6f",
          "resources": [
            "https://market.561.group/v1/book-record"
          ],
          "statement": "Sign in to use what this wallet has been granted at market.561.group.",
          "uri": "https://market.561.group/v1/book-record",
          "version": "1"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "address": {
              "type": "string"
            },
            "chainId": {
              "type": "string"
            },
            "domain": {
              "type": "string"
            },
            "expirationTime": {
              "type": "string"
            },
            "issuedAt": {
              "type": "string"
            },
            "nonce": {
              "type": "string"
            },
            "notBefore": {
              "type": "string"
            },
            "requestId": {
              "type": "string"
            },
            "signature": {
              "type": "string"
            },
            "statement": {
              "type": "string"
            },
            "type": {
              "type": "string"
            },
            "uri": {
              "type": "string"
            },
            "version": {
              "type": "string"
            }
          },
          "required": [
            "domain",
            "address",
            "uri",
            "version",
            "chainId",
            "type",
            "nonce",
            "issuedAt",
            "signature"
          ],
          "type": "object"
        },
        "supportedChains": [
          {
            "chainId": "eip155:8453",
            "type": "eip191"
          }
        ]
      }
    },
    "lastUpdated": "2026-10-24T13:18:40.46Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-24T13:18:40.2Z"
    },
    "resource": "https://market.561.group/v1/book-record",
    "serviceName": "book-record",
    "tags": [
      "bibliography",
      "books",
      "isbn",
      "csl-json",
      "open-library"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Validate one ISBN checksum and return its Open Library edition, work and author records projected into one sourced CSL-JSON book item; invalid or absent ISBNs return an explicit refusal. The FOUR truth reading is true when found and neither on refusal."
}

What the leaf hashes

{"body":"c5a96657bf53dc4bf7e281cf7179dd4babe6d0d663af581e5b4b4ecff17d0205","id":2199159,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646763374828,"prev":77395,"subject":"x402_bazaar:https://market.561.group/v1/book-record","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x650511f40d42146efc0e11619341faec257c69ade6008ef3b3b2556779fb2536
2. 0x7bfc733a958ec96454efecd0eec4e780564ec0794e12f64edd5f2996c890a2b8
3. 0xcdf29898854f9dc9474dd241fea04d1a9a66d355940eedab1431385eaf67901a
4. 0xc7d25a24db364a61bad050eb12729509db4911b9b524ab9d8c57d1b73cc9b5f0
5. 0x488d54a8e40a5d4b32732a21ecb7498fc3ebd5cc545745a2dc7f838c87816b00
6. 0xd8830f3ff3a6627bc43cf564eebbc1ed41fcdd284da84487bf48f8b4c2acaa90
7. 0xe8d29d5823fb237cbf1a93a1525f3463e60092dee66dc129805527ac98e46f23
8. 0x563d3c3e19a162e69be66f3c9f6af12f0fee4f8126103450e8bfad9b7e504cc1
9. 0x98da5db8d2757aebfc8a8f478f46f20e12581b32ece38021e5dfa416e964718c
10. 0xf65d069e65b34971f8cb9629be2c9645b0a16ff10b58fd99705cdab882de7503
11. 0xc22bf8dda2573f79919e43ad45faca4e4dcdf9985489ec15be1a40d2b0860312
12. 0xfb198b5e9ed6a30d23cc6c63e240376a59838835d128c19ba80c223b34685b35
13. 0x43843187ed08d9e521651cb9dfff6531be94049b43e391bab5e05b93fc4383d3
14. 0xfb5ea8fd7d0c463ff98fdc93228854845802421c0e3865536227edf756498fcd
15. 0x23f4763e8db2efe57fbc28dfc68f2b97b65f54a03425994e68157763af649a50
16. 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af