Evidence row 2201349

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://barcode-qr.x402tookit.com/barcode-check-digit"
    ]
  ],
  "name": "Barcodes and QR Codes",
  "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": "Compute or verify the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14) and SSCC numbers.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "code": "4006381333931"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "action": "verify",
              "asOf": "2026-10-21T00:45:40.904Z",
              "checkDigit": 1,
              "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.",
              "fullNumber": "4006381333931",
              "givenCheckDigit": 1,
              "name": "EAN-13",
              "notChecked": [
                "whether the number is allocated to a product or pallet (GS1 registration is not checked)",
                "the GS1 company prefix"
              ],
              "payload": "400638133393",
              "reasons": [
                "Well formed does not mean registered to a product or pallet."
              ],
              "source": "computed locally",
              "summary": "EAN-13 4006381333931 has a correct check digit (1).",
              "type": "ean13",
              "verdict": "VALID"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "code": {
                      "description": "Digits with or without the check digit, e.g. 4006381333931 or 400638133393",
                      "type": "string"
                    },
                    "type": {
                      "description": "ean8, upca, ean13, itf14 or sscc (default: guessed from the length)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "code"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "action": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "checkDigit": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "fullNumber": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "givenCheckDigit": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "name": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "payload": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "type": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-02T04:05:20.56Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-02T04:05:20.32Z"
    },
    "resource": "https://barcode-qr.x402tookit.com/barcode-check-digit",
    "serviceName": "Barcodes and QR Codes",
    "tags": [
      "gs1",
      "check-digit",
      "ean",
      "sscc",
      "barcode"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Compute or verify the GS1 mod-10 check digit for EAN-8, UPC-A, EAN-13, ITF-14 (GTIN-14) and SSCC numbers."
}

What the leaf hashes

{"body":"6797a36b828681054461048de625ff57be0346e20c01a66791462f9cda64724d","id":2201349,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646804606938,"prev":null,"subject":"x402_bazaar:https://barcode-qr.x402tookit.com/barcode-check-digit","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. 0xe3664d9ebabb4d90f1a3b66c1bd7d7f10b5ee34b4e92b390d518e04bed8d73f2
2. 0xf1f713abdc944a5e37d3cc66a37e16311c43600572f00b6c8da3baecaaf6e219
3. 0xbf7d4d8ea1e46dc97310f220e7f14e2b5dbf91ed696b9d642e9898bb059f2fea
4. 0x54e8fc3a2984bf02a4f5e11aba1cebd2b01eb7be085d0b90cf8f155ecf15ef29
5. 0x6c984111acf5ec2c2eb9c3e8da2d21782c6419486ade879a2c0052fd61cc7fc9
6. 0x689b2df325fab259f236c7858322b99c9c31156c58057b2337ea424b1cb60a8d
7. 0xfd4f23b14b540d99e3afbf1559b2ec185ee33e74896e3a8e2b40a47f07ed156b
8. 0xd35d21aff1181392f4f62df5d81b48981c3caaf7cfeab396a676179adc207fde
9. 0xf5f8632fe07a90c540ce9afdf06b1be6e10cdce51bd30e67a83ebfeb97d8c04b
10. 0x29cc9620385c92c75a050448658c0db02e88b987c883c37d41d5d8e97433273d
11. 0x3dc07e7ba06e935a44f5bfc499122aa5ce625052b8f06246e76f153d8edd8c5c
12. 0xa425522b81e7f1b0749052147327a6c322a17427ffc07733771c29e826d80c1b
13. 0x5dd9fbf811b05f3e5af51f812b6eea86a039a192f115aecc0fd37a502e3a04f1
14. 0x3e441d3f53c7b69d6c73ef93d327dfc3071a522c550856540832b34fcb531738
15. 0xd643f764eee39146411d4bff8903a327f4f8f55616e14e57281a245206d6ed2b
16. 0x6dd7e4db65395e8670c7c2747d44fec79e03305934ef4746bf5dbca04ec6ec49
17. 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
18. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af