Evidence row 123264

Observed 26 Oct 2026, 14:40 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://twin.unykorn.org/research/isbn
Recorded: 26 Oct 2026, 14:40 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: be2cac8e2e8e5cf07fbff754e69a3466eca8d1ada5e0299a53e2c9dae1153b84
Leaf: 0xfe32daff5ae6c5c0c202c62e43efa5a4a8f575ebe7ccc597bf8ca2da90450956

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://twin.unykorn.org/research/isbn"
    ]
  ],
  "name": "twin.unykorn.org/research/isbn",
  "owner_address": "0x7d9a65d06dcc435a52d5880c6310bd6e96c156db",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x7d9a65d06dcc435a52D5880C6310Bd6E96c156DB",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x7d9a65d06dcc435a52D5880C6310Bd6E96c156DB",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "maxAmountRequired": "3000",
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "52EqTZigRAnBphuYAuREjQJx5H5ryyc1RETpDR2dZFQp",
        "scheme": "exact"
      }
    ],
    "description": "ISBN lookup: title, publisher, date, pages — Genesis402 / UnyKorn Operator Network",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "params": {
                "isbn": "9781119473862"
              }
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "evidence_hash": "sha256:<64hex>",
              "generated_at": "<iso time>",
              "limitations": "<text>",
              "ok": true,
              "receipt": {
                "amount_usd": 0.003,
                "receipt_id": "g402-<16hex>",
                "tx_hash": "0x<64hex>"
              },
              "sources": [
                {
                  "name": "<source>",
                  "ok": true
                }
              ],
              "type": "isbn-lookup"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "body": {
                  "properties": {
                    "params": {
                      "properties": {
                        "isbn": {
                          "description": "ISBN-10 or ISBN-13",
                          "type": "string"
                        }
                      },
                      "required": [
                        "isbn"
                      ],
                      "type": "object"
                    }
                  },
                  "required": [
                    "params"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-06T07:05:18.536Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-06T07:05:18.35Z"
    },
    "resource": "https://twin.unykorn.org/research/isbn",
    "tags": [
      "books",
      "isbn",
      "catalog",
      "infra",
      "ai"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "ISBN lookup: title, publisher, date, pages — Genesis402 / UnyKorn Operator Network"
}

What the leaf hashes

{"body":"be2cac8e2e8e5cf07fbff754e69a3466eca8d1ada5e0299a53e2c9dae1153b84","id":123264,"kind":"listing","method":"baseline/1","observed_us":1793025622945460,"prev":null,"subject":"x402_bazaar:https://twin.unykorn.org/research/isbn","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).
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Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON