Evidence row 2202032

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://crypto-math.x402tookit.com/check-digits"
    ]
  ],
  "name": "Crypto Math",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Generate or validate Luhn and ISO 7064 mod 97-10 (IBAN style) check digits from the string you supply.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "action": "generate",
              "scheme": "iban",
              "value": "GBWEST12345698765432"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T23:46:27.454Z",
              "checkDigits": "82",
              "countryCode": "GB",
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "iban": "GB82WEST12345698765432",
              "ibanLength": 22,
              "notChecked": [
                "that a number is issued, active or belongs to anyone: a passing check digit proves only arithmetic consistency",
                "country-specific IBAN length and BBAN structure, bank codes and national check digits",
                "…1 more"
              ],
              "reasons": [
                "Per ISO 13616: BBAN, then country code, then 00, converted with A=10 to Z=35; the check digits are 98 minus that number mod 97.",
                "Country-specific length and BBAN layout are not validated."
              ],
              "scheme": "iban",
              "source": "Luhn (ISO/IEC 7812-1 Annex B) and ISO 7064 MOD 97-10 (as used by ISO 13616 IBAN), computed locally",
              "summary": "IBAN check digits are 82: GB82WEST12345698765432.",
              "verdict": "COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "action": {
                      "description": "generate (default; value has no check digits yet) or validate (value includes them)",
                      "type": "string"
                    },
                    "scheme": {
                      "description": "luhn, mod97-10 or iban",
                      "type": "string"
                    },
                    "value": {
                      "description": "luhn: digits; mod97-10: digits and letters; iban: country code + BBAN to generate, or a full IBAN to validate. Use sample numbers only",
                      "type": "string"
                    }
                  },
                  "required": [
                    "scheme",
                    "value"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "checkDigits": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "countryCode": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "iban": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "ibanLength": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "scheme": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:46:01.798Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:46:01.513Z"
    },
    "resource": "https://crypto-math.x402tookit.com/check-digits",
    "serviceName": "Crypto Math",
    "tags": [
      "luhn",
      "iban",
      "check-digit",
      "iso-7064"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Generate or validate Luhn and ISO 7064 mod 97-10 (IBAN style) check digits from the string you supply."
}

What the leaf hashes

{"body":"6d531e9ac3bb537b8b96730a9d2f4b941b15a1783328373aa6bf22659e738831","id":2202032,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811423577,"prev":null,"subject":"x402_bazaar:https://crypto-math.x402tookit.com/check-digits","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xc72afa4d20cd8d18360d2cc53b76d5f631be016034a5cc6683ac71bf1f3cbc9b
2. 0x5741907b21115c8ee8496c1a12f919ad43e3a4aed7209ee9b13505b271c423de
3. 0x23556ba3c85e3a055aa6be8f19c9b8a60ad659c1b5633b2ac7ff3d15f8efd07c
4. 0x6ac0cac12e468656ca9b98b84ebadcab291cf3a27daeb357474f5df5275fee8e
5. 0xe2521bd79e702008d5aa2f1a5c1993a48ee87df91ccd08076c1f019a86643af6
6. 0x55c52d6f33af3573f04592bdbf47b8db4cb593fedf748a3ca08bfe10fd08504c
7. 0x675f52e7e914a6f1a4dd2e40b4f98526b54e053f91c002a262068c28195b3f8e
8. 0xa1fcb080de89c0d98e43f7f5f93901154d1722e4caf7802b59007944401b1078
9. 0x54f863edfe3c8f3806cf04c42d845672a5e492d0262f796089b942f854d36018
10. 0x659b949a3f56705ee418b91f26512bad1c17ad3a07aead09a724e73e478c976b
11. 0xda35a59387ac9fc9e7dad8ab6abb65f42c79d9528024dcd4acb5c76b973f1467
12. 0x942740cddeed7123051e190307c21ccb37608ec5eeace8731911c10cf9acb06a
13. 0xafa7c2528a5e5ab2ec272c4794ef9517ca380c049b82862d11597b1e41a75b95
14. 0xdfd116d725e076b0e3bd74ff5682dfe6834735313673c580d2e58972567174a0
15. 0x5b456020389d8e0ef67f16a492c600b5b88189e59398bba308734db7e873e7e4
16. 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
17. 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af