Evidence row 271874

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://checkdigit.openverbs.com/v1/ean"
    ],
    [
      "x402",
      "https://checkdigit.openverbs.com/v1/imei"
    ],
    [
      "x402",
      "https://checkdigit.openverbs.com/v1/isbn"
    ],
    [
      "x402",
      "https://checkdigit.openverbs.com/v1/luhn"
    ],
    [
      "x402",
      "https://checkdigit.openverbs.com/v1/routing"
    ]
  ],
  "name": "checkdigit.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "checkdigit.openverbs.com",
    "endpoints": [
      {
        "description": "Validate a GTIN barcode number — EAN-8, UPC-A (12), EAN-13 or GTIN-14 — by the standard mod-10 check digit. Length selects the scheme.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "4006381333931",
            "group": "body",
            "name": "number",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "EAN / UPC / GTIN check",
        "tags": [
          "gtin validation",
          "validate barcode number",
          "ean upc check digit",
          "upc validation",
          "ean 13 checksum"
        ],
        "url": "https://checkdigit.openverbs.com/v1/ean"
      },
      {
        "description": "Validate a 15-digit mobile device IMEI by its Luhn check digit. Spaces and hyphens are ignored.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "490154203237518",
            "group": "body",
            "name": "imei",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "IMEI check",
        "tags": [
          "imei validation",
          "validate imei number",
          "mobile device imei",
          "imei check digit",
          "imei luhn check"
        ],
        "url": "https://checkdigit.openverbs.com/v1/imei"
      },
      {
        "description": "Validate an ISBN-10 (mod-11, trailing X allowed) or ISBN-13 (GTIN mod-10) book number. Length after removing spaces/hyphens selects the scheme.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "9780306406157",
            "group": "body",
            "name": "isbn",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "ISBN check",
        "tags": [
          "isbn validation",
          "validate isbn",
          "isbn check digit",
          "isbn 10 isbn 13",
          "book number lookup"
        ],
        "url": "https://checkdigit.openverbs.com/v1/isbn"
      },
      {
        "description": "Validate a number by the Luhn (mod-10) algorithm — the scheme behind credit/debit card numbers and many IDs. Spaces and hyphens are ignored. A mismatched check digit is a successful { valid: false }.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "4111111111111111",
            "group": "body",
            "name": "number",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Luhn check",
        "tags": [
          "luhn validation",
          "validate credit card number",
          "mod 10 check digit",
          "luhn checksum api",
          "check card number"
        ],
        "url": "https://checkdigit.openverbs.com/v1/luhn"
      },
      {
        "description": "Validate a 9-digit US ABA bank routing number by its weighted (3,7,1) mod-10 checksum. Spaces and hyphens are ignored.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "021000021",
            "group": "body",
            "name": "routingNumber",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "ABA routing check",
        "tags": [
          "aba routing validation",
          "validate routing number",
          "bank routing checksum",
          "us routing number lookup",
          "aba check digit"
        ],
        "url": "https://checkdigit.openverbs.com/v1/routing"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "checkdigit-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "checkdigit.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "checkdigit.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "gtin validation",
      "validate barcode number",
      "ean upc check digit",
      "upc validation",
      "ean 13 checksum",
      "imei validation",
      "validate imei number",
      "mobile device imei",
      "imei check digit",
      "imei luhn check",
      "isbn validation",
      "validate isbn",
      "isbn check digit",
      "isbn 10 isbn 13",
      "book number lookup",
      "luhn validation",
      "validate credit card number",
      "mod 10 check digit",
      "luhn checksum api",
      "check card number",
      "aba routing validation",
      "validate routing number",
      "bank routing checksum",
      "us routing number lookup",
      "aba check digit"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"bb27eda4bd22556106afa0175ef9d324a664db6d0634f6275c8ef5aee1c9a1e7","id":271874,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793038628066005,"prev":265555,"subject":"agentic_market:checkdigit-openverbs-com","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. 0xe912c3ed088db25751f512379164e80c6a6167cda87030e47edddfecc571d6c4
2. 0x79996952f0a88feac22c363b46e15c65f70c51f8f07428fc9e5e2ed9b6dbe792
3. 0x9864c61ee9a7b4284de15fa4e52b037d532c4f26c119a65d1d803b48e1e1801c
4. 0x15e0a4a54432da6ea6e0caf778e5b046cbe7e3c1cf520a2b0f9b8144b3e901c7
5. 0x3b29d6eafd52be576420eec6360eeccc3c1c971266941b450b28a5b6de1dc2bb
6. 0x78285e8ec9a7490b20b45669bac21a569a79377390683b0021b4c9b1a3cd5808
7. 0x847b372483c3c544b6fdd908d686def16f7f58728a228ca274912f1a5a220498
8. 0x0eae00518fef78a5f80d349323189af7bc8ddf6b787f3d51eef8aafb32c5f14c
9. 0x19721d0a168d76f762a49b84adc1235746ffaea2a65d35def50d5ccb4982cfd5
10. 0x35130b879dd64c383ed4810a48a0a89a89658ed812c5177a30ce52551f474534
11. 0x11f999a56e0d8cc7daa64e4903eb41d6078ed2b930cfcc1858070d91536f22ed
12. 0x3d0b5282d5282c30fc9f86662367cab01d0dba65f13d2968391a7d087b79dfb3
13. 0xafcc1fe54cfe00a3a1de33df127340075f22433bb89848bbc81499cd7aca5b2b
14. 0x9bc5fc98278b9f6dc18c66c6e162aefd5244be03170d41bc5161f58ad11beed7
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae