Evidence row 77395

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": 3,
      "l30DaysUniquePayers": 3,
      "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":"deb0f47394467a76e4c824d2d3974aff9f5dc65beefbcf49e71ed48e62b1ba9b","id":77395,"kind":"listing","method":"baseline/1","observed_us":1793025493916247,"prev":null,"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 2026-10-26 (296695 rows).

1. 0x20a3c8e2853f2c6e5a0892442512da5d5090b2c390479f4a20a3075dc6be822f
2. 0xfcffb9326ba9d171a52c11da58d35a6222851054a1af7b6cf98a63fb92844fe3
3. 0xc292c8e18164520ed1bde2de1b8f2aa4372f102bae5b066a540f98de27b72f33
4. 0x3fc7885466ac52e30aca6394028212ebdc2123b985a6de830e086c8ad8bb589a
5. 0xd11739d74e4b99c5951da7cbf26f90fe2297deb163c2e8373c3d86e04d7b2532
6. 0x1be927be7763bc60b716fefda3d712310fc2c0a39a42d2aede5668d3df67d393
7. 0x056984ab892dc586033345246ecfe5da52b53f1228411cf4322164c1dcec7606
8. 0xd77b2f6b644ff4bbbe4b999b7f033a51a6e54f68caa028286d6236c8746e7c7f
9. 0x3a4eb87f6cf56a6e6ec9d0649362f4406ff949fb6d435931429feef859d64141
10. 0x079e691201f8fe8ea3718cede784dde70b1316094e3ad526df647841955fcee3
11. 0x057e71ed555693238850b77237df28dd2661cf85c88138365b7e42941201ad01
12. 0xfde157310fc8513767b162378ca9ceefb2937c374b7381a8887f7ccba8ab5a80
13. 0x9d75d4d3ab6219edefa04be60b32fdd56be7a7672f370a5115f02f7b098ecd27
14. 0x9dfd312f3d4937f7cb144cee3987e8516f222932b4ea286605236d73cfa1ed16
15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae