Evidence row 1790230

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://reference-data-api.onrender.com/v1/vat"
    ]
  ],
  "name": "Reference Data API",
  "owner_address": "0x6bffcc85172372ad4e9c1ffafe97980a2c778fc7",
  "raw": {
    "accepts": [
      {
        "amount": "16000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6BfFcc85172372aD4e9c1Ffafe97980A2C778FC7",
        "scheme": "exact"
      }
    ],
    "description": "Returns EU VAT rates (standard, reduced, super-reduced, parking) for one or all 27 member states, recent rate changes, and calculates net, VAT and gross for an amount.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": "100",
              "country": "DE"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "calculation": {
                "gross": 119,
                "net": 100,
                "rate_pct": 19,
                "vat": 19
              },
              "country_code": "DE",
              "reduced": [
                7
              ],
              "standard": 19
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "amount": {
                      "description": "Amount to calculate",
                      "type": "string"
                    },
                    "amount_includes_vat": {
                      "description": "true if amount is gross",
                      "type": "string"
                    },
                    "country": {
                      "description": "EU country code (DE, FR, EL...) or name; empty = all",
                      "type": "string"
                    },
                    "rate": {
                      "description": "'standard' or a valid rate like 7",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T09:54:09.879Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-01T09:54:09.695Z"
    },
    "resource": "https://reference-data-api.onrender.com/v1/vat",
    "serviceName": "Reference Data API",
    "tags": [
      "tax",
      "vat",
      "eu",
      "ecommerce",
      "invoicing"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Returns EU VAT rates (standard, reduced, super-reduced, parking) for one or all 27 member states, recent rate changes, and calculates net, VAT and gross for an amount."
}

What the leaf hashes

{"body":"58bd0999b36c218c10228f60f605c420b28112e68492422ca5a7d891be6ed77f","id":1790230,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559932493512,"prev":null,"subject":"x402_bazaar:https://reference-data-api.onrender.com/v1/vat","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0xc487cbf00fcadff2e1b1114d998b359b6e47b5e658ae7ab418b2d57693539a52
2. 0x66e46f6ba5980d5011fe60d847a949d540b94c1297ab9f66fdf24dae82e16c06
3. 0x4c7254d711cd9a1392e55a9e4976a368c9c837cf525a757324bbd4641cce1788
4. 0x347c75039feab9ba6162eb368190ae9e7eca3f4b4ed1e7c1c47b702142fa3158
5. 0x489462bb6dbdf72a75f55ec20ac476cf1fa81050ba05098e9040df5b6c7bd000
6. 0x45e6ec4854728c83b193d936255aa1cac104202c9fe897f67bd65686968c3ffa
7. 0x9489cede35e803f4cf49cc72e82a706165744735639b154c8277e23647f72976
8. 0x093040080aa59e1608959c833cc3f0543763880d6ca3d5a3d2d0f5ca6b840cf7
9. 0x21518b148d6293b3ffb12a6fca4db7e5b7f99e6e67fb39446a9824042dd1ba57
10. 0xb569d3763d2df0f64d1f1b7a1eee0e519bcce95754baabddc68c7a29919b7af0
11. 0xe6a261cba1ad1eb2aab5d624bd4b22ef550feab3bd1bbc85310f237f87ac6b27
12. 0xd5ca92b6f641bfd600c48f81eea331e7e66b80f69968a36fa6367c54c06aee80
13. 0xefa31efdf607e8d04b8c9fc919db78fe5a26a3ddbd6b0e7563c8ca73dc801298
14. 0x5da52d6bfc8f88d79ebced4b6bebec468f5c2d8a21c193d44e901c7a6ce7941e
15. 0x537331ef190eaefb4419f2a4558b952aaf9435d759df0b0c118b7df609ec1687
16. 0xfc183bee85dc11a067fb710c6eb88824b94a516ddbdf2717b839e672a2206a7e
17. 0xb5916fb7a3e87dc0702e46eeadcd22652e2e1e755f8d429cc7a14a67a350b51b
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90