Evidence row 549105

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://scrooge-x402-tool-mill.vercel.app/v1/watch"
    ]
  ],
  "name": "scrooge-x402-tool-mill.vercel.app/v1/watch",
  "owner_address": "0xfe2353c808f2409ccb81508005a62cef29457706",
  "raw": {
    "accepts": [
      {
        "amount": "100000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xfE2353C808F2409cCb81508005A62cef29457706",
        "scheme": "exact"
      }
    ],
    "description": "Watch one public page for 7 days. Checks hourly. When the content hash changes, POST {watch_id,url,old_fingerprint,new_fingerprint,changed_at} to your https callback (5s timeout, one retry). POST JSON {\"url\":\"https://example.com\",\"callback_url\":\"https://example.com/hook\"}. Returns {watch_id,url,expires,status_url}. Free status is GET /v1/watch/:id and does not show the callback. At 500 active watches, POST returns 503 before payment. $0.10 USDC on Base (eip155:8453). No API key.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "callback_url": "https://example.com/hook",
              "url": "https://example.com"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "expires": "2026-10-12T00:00:00.000Z",
              "status_url": "https://scrooge-x402-tool-mill.vercel.app/v1/watch/0123456789abcdef0123456789abcdef",
              "url": "https://example.com/",
              "watch_id": "0123456789abcdef0123456789abcdef"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "callback_url": {
                      "description": "Public https URL that receives one POST when the page content hash changes",
                      "format": "uri",
                      "type": "string"
                    },
                    "url": {
                      "description": "Public http(s) URL to fetch (SSRF-safe; private/link-local blocked)",
                      "format": "uri",
                      "type": "string"
                    }
                  },
                  "required": [
                    "url",
                    "callback_url"
                  ],
                  "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": {
                  "additionalProperties": false,
                  "properties": {
                    "expires": {
                      "description": "When the 7-day watch ends",
                      "format": "date-time",
                      "type": "string"
                    },
                    "status_url": {
                      "description": "GET this for status. The callback URL is not included.",
                      "type": "string"
                    },
                    "url": {
                      "description": "Page being watched",
                      "type": "string"
                    },
                    "watch_id": {
                      "description": "Id for the free status URL",
                      "type": "string"
                    }
                  },
                  "required": [
                    "watch_id",
                    "url",
                    "expires",
                    "status_url"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T07:26:36.663Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-27T07:26:36.083Z"
    },
    "resource": "https://scrooge-x402-tool-mill.vercel.app/v1/watch",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Watch one public page for 7 days. Checks hourly. When the content hash changes, POST {watch_id,url,old_fingerprint,new_fingerprint,changed_at} to your https callback (5s timeout, one retry). POST JSON {\"url\":\"https://example.com\",\"callback_url\":\"https://example.com/hook\"}. Returns {watch_id,url,expires,status_url}. Free status is GET /v1/watch/:id and does not show the callback. At 500 active watches, POST returns 503 before payment. $0.10 USDC on Base (eip155:8453). No API key."
}

What the leaf hashes

{"body":"d16ad2b039d2539f208c5162edf6897f257711147601140e87c8f3527e298abb","id":549105,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133349874965,"prev":453690,"subject":"x402_bazaar:https://scrooge-x402-tool-mill.vercel.app/v1/watch","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xf0b90fbf1d4e1805f6221ec164d37866948412629572a085bcce4f7bcdbc6cec
2. 0x61e179a30c1b42cf14155de1844608b412a2503845fa951f037d4f84619756f3
3. 0x5258e69a5fa2ce8cd58ddad8afe6b0e82bb0cf96a92adf18ff1e179cfd386a6e
4. 0x690285b58f1a3dc95371484bcae47fbe914c835d53f09870ab3eb3d0b000e50c
5. 0xae9f626c50ee5ece815d8443298159d2f8188cf4d71d37112e7e7bd170c8f62f
6. 0xb364aed7f9a1c5de17bf8b7495fe93f5c65460f213e3522fc8880fe9dbd774a4
7. 0xcf12c8f37a1b036323f10607731e8609ce66b7aa6a24c51b259792134ba39da0
8. 0xdb2c8271f2a265dfc431c9629ab6df406b2429b55f3da290ef03c1fc4df944ed
9. 0xde7a56f4c3cfd442962cc4b161de5f6b061d36c3ad3bed01b0bd8be6e01f96bb
10. 0xa8ede6cbd2329bd5bed9232d36784842db5d39cce33fa60c3f43dfb8d8d175a2
11. 0x86a162701c5c4382d7e2217c5bfe590eb52de9faf1001063b4fb50d51cc6745b
12. 0x8b1294df8f40a2bb6ff0bafdf2505700af24dfe2985fb999b2353f4c85cb56ba
13. 0xe0ddf3e1c8349b7fe55d4b2a6864486a77de3e3c0e371df44d69aeb837cfd79c
14. 0xce1471491ffb52101d7cd9884cca0fb37a9496f6e8250375054907d24a35d04f
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4