Evidence row 72305

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://checksum.openverbs.com/v1/crc32"
    ]
  ],
  "name": "CRC-32 (IEEE)",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "data": "example",
              "encoding": "utf8"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "data": {
                      "description": "Input payload.",
                      "maxLength": 5000000,
                      "type": "string"
                    },
                    "encoding": {
                      "description": "How to decode `data`. Default utf8.",
                      "enum": [
                        "utf8",
                        "hex",
                        "base64"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "data"
                  ],
                  "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"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-05T13:13:00.575Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-05T13:13:00.309Z"
    },
    "resource": "https://checksum.openverbs.com/v1/crc32",
    "serviceName": "CRC-32 (IEEE)",
    "tags": [
      "crc32 checksum",
      "calculate crc32",
      "crc32 api",
      "zip checksum",
      "gzip checksum"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only."
}

What the leaf hashes

{"body":"db088b8b93f87d884ab98ac9f190d69eb83f4bcb9bd1a2ded6a39be9956e13e1","id":72305,"kind":"listing","method":"baseline/1","observed_us":1793025485615919,"prev":null,"subject":"x402_bazaar:https://checksum.openverbs.com/v1/crc32","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. 0x6f7c7795675866e0503e6d8d8b8140cf71bd3eeaf1ed71048c5823211e01c880
2. 0x7b8ab8b51bbee302512c656608aaa134a83681bb4cdc78f9c0aa470a218a9614
3. 0xdfece8b580a4a60fc501c38c92a87e186e07f6ef7ecf3d2d42385376a76c8db0
4. 0x55b1a448fe25aeebefee76b012caecff1b41eefea16525c1c8bdcd8c8ce5bc03
5. 0xcbc7f045ec92bde10cbc198aefb406b79dbfc5684f3be40a4529742c54ad331a
6. 0xcac398d35effa352289e278aa20ed1a8216657a3d99fd601a2d63d20c5ddd311
7. 0x33520bd33bc48d7f6a48f5fa2d732ded735a35207e61c558ad7b7ba6157a8e44
8. 0x817ce2c05801d170eec3991bbd07719617fb2a48c6913644041e20dd0d65444f
9. 0x2773a5a6e6f20769dca171f503ffeb524474c482023595e821f47e35181ac53b
10. 0xc70d346129c156fcaba34294b762967bcbb4de7a74526ae0ff9df5eeef4e6d37
11. 0x83da3d3b0ffc00454b09f0b6f54a0a4bb8b5fabd87854d6bb2d7abda681b5d72
12. 0x5be1d69fd9353c3a75685caffea8c98e8f079f5072011c82517cc5f365ba32f8
13. 0x14b83e3bc6587240f31cd033d09d131e0775b7b00aada9042597008a70399013
14. 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae