Evidence row 3762749

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": 1,
      "l30DaysUniquePayers": 1,
      "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":"2d540f08327fda9dfc424ee31a4f27b4c2a0416bc12b9869051e284872d22f83","id":3762749,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793996515296298,"prev":2199159,"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 2026-11-06 (303443 rows).

1. 0x69f469ff942608c66eaa38aaf17d5047cbe941d636848032df5bd8b6166f8b5b
2. 0xfda377c9a57c19ff4269a8dac12894936c370c245df0bc392ecc074c02db5c17
3. 0x6e21694ad1e212288369a065b8575155267f92b8e14b4fcc2e00e2278deab060
4. 0x45f785dc40108c9471ed588f7df822a9b7f3572eb52e4d4fee45b42f00955908
5. 0xbf13cf704953a8181a343457f6254f47045427aedfce06be20bf8d2398f30a75
6. 0x6971de7ce81d6993428be26e8900d799db794e488ab00abed4f57f2d7603b0cf
7. 0x3c897ef5f62d8c7094d003c0154b03c20546f2d8ba2f8ff2cd5457c12b9f33eb
8. 0xa76a42af86e55ab102829e93935664b86dc2da4b7ba4a5c79151afa34d5b3355
9. 0x66971acb69521892c69d35e8ad295bb11cd61c2289b2930ad149e623f469762b
10. 0xcf73dfc5271c15dfc4f9231a036c1b310347c41132e63f476f2ec41351df141a
11. 0x1d89ce3278a8c8d070e024bedb9a76160cce3c5c10dcebe3ccc6475359c06167
12. 0xd08887e0e259c994aafffc1a9aaaa7b1eedd819896b15147f02e48377f5697a5
13. 0xa59d707bff526a1af46d148195333570abcef45decc6fb736843cb6b63c23d94
14. 0xe02e716313f6c894f9aba6c60b7f4604a748d028c5f11750f11cfb94f52a57bc
15. 0xf2bc30db87e2aa2afe08f16c1943f967ac74b2e32364ad0b7cb45d2ffee7e447
16. 0x7a2e5c8104eb5015bfa08d52a9278aa0b4da48bd2fb98690cc2d1c225b5dc691
17. 0x4a618d78b1cebba8beec4ef22aaac9187dcdfb39064e0be537ca2600abb90740
18. 0x119743aadcddb571b28b442b62196d4a0afc4e1c9979c2d477d34fcc9413deaf
19. 0xc0d08d48601d1be90bcfc025e66bcaa0030120d688dd9c919b36c2c4446f4948

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1