Evidence row 1261449

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://tools.usefulwork.app/tools/check-links"
    ]
  ],
  "name": "Useful Work tools",
  "owner_address": "0x7d020f2167f44a9d52859f7f81cfdae32dc845ec",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x7d020f2167f44a9d52859F7f81cFDae32Dc845ec",
        "scheme": "exact"
      }
    ],
    "description": "Check up to 15 links on a public web page and report which are broken",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "url": "https://example.com/"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "broken": 0,
              "checked": 1,
              "links": [
                {
                  "status": 200,
                  "url": "https://iana.org/domains/example"
                }
              ],
              "page": "https://example.com/"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "url": {
                      "description": "A public http(s) page address",
                      "type": "string"
                    }
                  },
                  "required": [
                    "url"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "useful-work": {
        "available": false,
        "reason": "send an X-Useful-Work-Agent header (8-128 characters) to be offered work",
        "version": 1
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793320018/bazaar-icons/8fc427e2b44afe48.png",
    "lastUpdated": "2026-10-30T18:33:33.121Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-30T12:50:46.36Z"
    },
    "resource": "https://tools.usefulwork.app/tools/check-links",
    "serviceName": "Useful Work tools",
    "tags": [
      "web",
      "useful-work"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check up to 15 links on a public web page and report which are broken"
}

What the leaf hashes

{"body":"7b01771a0413d31799c346d95197877c269318bfeabeb9f6d85b0785399e03b1","id":1261449,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385511309175,"prev":null,"subject":"x402_bazaar:https://tools.usefulwork.app/tools/check-links","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x21199dd7bc9f1fc63e563fec9376a171ec76f88e2b5b4175523bb1fdffb28199
2. 0x4b4fa2689b8a54275fd20c8f8fffad1578bd423ab9e7f88439ae93693f3b0d5e
3. 0x37bc1ab9a3bf5a683dc9ffa1739810314938ba72c1d344a38077d653e458b2c4
4. 0xc30de0a94935259b72e3da49f58c4bef2ffb59ca59688c91ae328e255c09313a
5. 0x36c398749535f37ead86ef0045938865fbb1e58a7df17b68c4e4ad86fa0d1dd6
6. 0xbd18da7355c0c90a1c0fbff67bebe4d4266855e90813f29d5e2e8f8243de036b
7. 0x22cbc22a6e8a4bb49098c8d20a4ad693a095692576df61bbc3d42201b33540b4
8. 0x59a79769c3b9c766267a3677cf2fd6d323d4cc4141c39226424e00b928dccea7
9. 0xba8d566828428d828d9c098ddd6de771b6a58849c8b51e659b635c65f050582e
10. 0xb8b0aacf54d65d51c82524adf3d5dbcd4cb89a9be977396e91bcce2343ccc9df
11. 0x88f3794567aa5d3de74b7f3e40fdc950c06426f2b440cab02cf8604141e2809f
12. 0xceeca1bee88ff8601da6d33cd5ab6d65b985f0ffec897a2c0cfd08154ae67f98
13. 0xbd1446eaebfa305f15b340dea3e27a3e7b3a8ce24b81ebb8cc7d8916641b7cca
14. 0xa25de97dbaf2a3b2e2808c2011eada63945b08a93d4bb9a6253fb7a136aa5dac
15. 0x0313631fba69cc31784d20beec069335df13219f8a8a8a8831740bca4d4aa0a0
16. 0xe2a9872e1b6a01c55a7a8cc5c05c61f3933255db5c26b9c79be4011d28685b52
17. 0xb0c9ef42e725578748f3119c9dbebf2fc437266bda013df29f98ed3ebe621403
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861