Evidence row 526893

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://nbu.navistri.com/v1/rates"
    ]
  ],
  "name": "NBU Data Ukraine",
  "owner_address": "0x44e5ebeb366ab69a0a3c1c05080a01fe0d8013ef",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0x44e5eBeB366Ab69A0a3C1c05080a01FE0d8013ef",
        "scheme": "exact"
      }
    ],
    "description": "Official National Bank of Ukraine (NBU) exchange rates of the hryvnia (UAH) on a date: 40+ currencies, gold, silver and SDR, with English names. Call it when you need the legally official UAH rate for Ukrainian accounting, tax, invoices or customs, or to convert to/from UAH on a given date. Params: date (YYYY-MM-DD, default today in Kyiv), currency (ISO code, optional; omit for all).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "currency": "USD",
              "date": "2026-10-09"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "base": "UAH",
                "count": 1,
                "date": "2026-10-09",
                "rates": [
                  {
                    "currency": "USD",
                    "name": "US Dollar",
                    "nameUk": "Долар США",
                    "numericCode": 840,
                    "rate": 44.8526,
                    "ratePerUnit": 44.8526,
                    "setOn": "2026-10-08",
                    "specialConditions": false,
                    "units": 1
                  }
                ]
              },
              "meta": {
                "cached": false,
                "endpoint": "GET /v1/rates",
                "params": {
                  "currency": "USD",
                  "date": "2026-10-09"
                },
                "retrievedAt": "2026-10-12T12:00:00.000Z",
                "source": "National Bank of Ukraine open data (bank.gov.ua)",
                "sourceUrl": "https://bank.gov.ua/ua/open-data/api-dev",
                "terms": "Ukrainian public open data: free reuse including commercial use, with mandatory attribution to the source (Law of Ukraine 'On Access to Public Information', art. 10-1; https://bank.gov.ua/ua/open-data). Values are passed through unchanged. Not affiliated with or endorsed by the NBU.",
                "upstreamUrl": "https://bank.gov.ua/..."
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "currency": {
                      "description": "ISO 4217 code such as USD, EUR, PLN, XAU. Omit to get every published currency.",
                      "pattern": "^[A-Za-z]{3}$",
                      "type": "string"
                    },
                    "date": {
                      "description": "Date the rate applies to, YYYY-MM-DD, from 1996-09-02 to tomorrow (Kyiv). Default: today.",
                      "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "data": {
                      "properties": {
                        "base": {
                          "const": "UAH"
                        },
                        "count": {
                          "type": "number"
                        },
                        "date": {
                          "format": "date",
                          "type": "string"
                        },
                        "rates": {
                          "items": {
                            "properties": {
                              "currency": {
                                "description": "ISO 4217 alphabetic code",
                                "type": "string"
                              },
                              "name": {
                                "description": "English name",
                                "type": [
                                  "string",
                                  "null"
                                ]
                              },
                              "nameUk": {
                                "description": "Ukrainian name",
                                "type": [
                                  "string",
                                  "null"
                                ]
                              },
                              "numericCode": {
                                "type": [
                                  "number",
                                  "null"
                                ]
                              },
                              "rate": {
                                "description": "UAH per `units` units of the currency",
                                "type": "number"
                              },
                              "ratePerUnit": {
                                "description": "UAH per 1 unit of the currency",
                                "type": "number"
                              },
                              "setOn": {
                                "description": "Date the NBU set the rate",
                                "type": [
                                  "string",
                                  "null"
                                ]
                              },
                              "specialConditions": {
                                "description": "USD only: rate set under special conditions",
                                "type": [
                                  "boolean",
                                  "null"
                                ]
                              },
                              "units": {
                                "type": "number"
                              }
                            },
                            "required": [
                              "currency",
                              "rate",
                              "units",
                              "ratePerUnit"
                            ],
                            "type": "object"
                          },
                          "type": "array"
                        }
                      },
                      "required": [
                        "date",
                        "base",
                        "count",
                        "rates"
                      ],
                      "type": "object"
                    },
                    "meta": {
                      "properties": {
                        "cached": {
                          "type": "boolean"
                        },
                        "endpoint": {
                          "type": "string"
                        },
                        "params": {
                          "type": "object"
                        },
                        "retrievedAt": {
                          "format": "date-time",
                          "type": "string"
                        },
                        "source": {
                          "type": "string"
                        },
                        "sourceUrl": {
                          "type": "string"
                        },
                        "terms": {
                          "type": "string"
                        },
                        "upstreamUrl": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    }
                  },
                  "required": [
                    "data",
                    "meta"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:10:03.926Z",
    "quality": {
      "l30DaysTotalCalls": 12,
      "l30DaysUniquePayers": 10,
      "lastCalledAt": "2026-10-27T10:10:03.525Z"
    },
    "resource": "https://nbu.navistri.com/v1/rates",
    "serviceName": "NBU Data Ukraine",
    "tags": [
      "data",
      "finance",
      "ukraine",
      "exchange-rates",
      "nbu"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Official National Bank of Ukraine (NBU) exchange rates of the hryvnia (UAH) on a date: 40+ currencies, gold, silver and SDR, with English names. Call it when you need the legally official UAH rate for Ukrainian accounting, tax, invoices or customs, or to convert to/from UAH on a given date. Params: date (YYYY-MM-DD, default today in Kyiv), currency (ISO code, optional; omit for all)."
}

What the leaf hashes

{"body":"4c3cd1ef8860305b92914d8d2b19536ab153758a60a6c8a0af94af783d3a0e0c","id":526893,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124792342920,"prev":451957,"subject":"x402_bazaar:https://nbu.navistri.com/v1/rates","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xf50e2ff5c5ea933d0116cff3b4d637d7cb4b913ff212a142d479650fa9aa2e91
2. 0xacb63d8d55ddfc82e7130429cb68c937b695d0926eff79d12979f166853fd52f
3. 0x93ab51f5ece07699ae767add1daca252cda02e666a13a11c68b2170294b65551
4. 0xd02e2f946f6bebdc77871b2db56547153eab3306ca4219a090a815adf7ac065e
5. 0xd06c1e54f321c33ae052154fb0ec46e0911d8a9811080f8d86132ff728c1e9e9
6. 0x79a6a70762dca94e71b3a536770ebd4b5fd21bf12385b9f7222beef2e16ab8e1
7. 0xeba1fdce282b77def4a1243e2a666b3db550a431d19d15054ddf7e96a32c8c20
8. 0xb903996c95bc51e435b0cee540ab8bdc1c85388ee1a85a771e3bab1ee1ec0f36
9. 0xada3cd8f79645dafe16116f799c9d819f91cd18629a07eb6f39f297e8373a7b2
10. 0x93fc5308107b180f57d801c3d45bf7c4b0bcf9c2e5d1bda9bb75b99123fad1ef
11. 0x1ffe67ce384817ba887de8b4161984586f165c7fa95cef6567ef55d47adb58f2
12. 0xd80cea574304ef1eee7c8b03c1efcaf66eb83498acb1756c4e37eb1d063b48be
13. 0x47993ad5e402c748d96928c5127292d12f5f590d15cf544698f6bb348ad7dc9b
14. 0xce1471491ffb52101d7cd9884cca0fb37a9496f6e8250375054907d24a35d04f
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4