Evidence row 1507835

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": "2026-10-31T18:18:32.416Z",
    "quality": {
      "l30DaysTotalCalls": 7,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-31T09:25:27.41Z"
    },
    "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":"96fe8e43a8c2884b51eb3e17abd6e03241576b593f7dc94aa5302d9b79982e04","id":1507835,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472705141278,"prev":1261449,"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 2026-10-31 (246033 rows).

1. 0x168705100fed98c0f2300124948a01dcceb8b0a2be641b95804707f59ddd4fe4
2. 0x25f5f401aac357f75144e41645cf7175bb594ffa3185a9917b904779cbd8a6d2
3. 0xebb16aa7028de0920f92c150d8919e776c17fb274df31383a2529eebe6e0e570
4. 0x4b351b244f2c7a2570fa9cf5aa747d1ae312a276dee40346a16ac4cd84a85585
5. 0x642c76b385ff34494d7540c6d3cac128eb8cdcec0f89deaeaaa57ae07453d588
6. 0x3a6788de1769f9270909bcfef761c10d2d736730d3bb3a41efb3d5ff3b1421fb
7. 0xf253b82c0a5d4e7a6e471e2eafe6de0f025964f528b3acbe126a4e6d4ad3b7be
8. 0xa891697b7f596569a960feba0c7d1ebfb69b2cb82dfac1e7252edf76ec15092e
9. 0x09e7da8a21e79284db848afc6677abd33297fd6cdd9d45ce91e19aacf20a98fa
10. 0x93454950af3872a3c38d0dccaacd12301099da3031ea16d4edc756e2ce625c1f
11. 0x6e947ec51bd3eae045cd30a82002890d3817e015623b8ae5ab710a6a012c0a94
12. 0x8f05aaf697494ea816fabf6d5bccebf967b28efb61f3889bc06149d5f34720fc
13. 0x2fb3353875d04f7bcf4a3e6c4b8752f251dbfb2f984efb332ea96d75516ac33b
14. 0x500efd0d65e793a02397af46769412226d4deefe24ac497b68f3a32f6828638e
15. 0x95ec49fc7f2c7be30422eaa1d0d6036836dd63ff46a8ed4027258fcf3eb8cf24
16. 0x2bca4aa3c59fe9209016c64bd8b706423477e3407201a00165afde9abf6fee2b
17. 0x37f13582abb3c002d51c2f190c312129cbc3a39754618fee2c75c2441bb1eb94
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0