Evidence row 2204135

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://mitteleuropa.halowerk.com/v1/sk-soil-nitrogen"
    ]
  ],
  "name": "HALOWERK Central Land",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "asset": "USDC",
          "assetTransferMethod": "eip3009",
          "eip712Domain": {
            "chainId": 8453,
            "name": "USD Coin",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "version": "2"
          },
          "name": "USD Coin",
          "network_name": "Base Mainnet",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "scheme": "exact"
      },
      {
        "amount": "4000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "6pXwvPgqduMSx33GP8jiVCanpUhZZiPPyG784mNJ7q1Z",
        "scheme": "exact"
      }
    ],
    "description": "Mean SoilGrids total nitrogen for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "latitude": 48.1486,
              "longitude": 17.1077
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "authoritative_status": "preliminary_non_binding",
              "category": "country",
              "charged": false,
              "checked_at": "2026-10-23T02:05:26.300Z",
              "confidence": 0.73,
              "confidence_method": "Conservative minimum source-family basel",
              "data_date": "2020-05-01T00:00:00.000Z",
              "evidence_classification": "derived_from_open_geodata",
              "generated_at": "2026-10-23T02:05:26.300Z",
              "result": "measurement_available",
              "risk_level": "not_applicable",
              "service": "sk-soil-nitrogen",
              "service_id": "eli-0442",
              "status": "success",
              "summary": "Slovakia: Topsoil nitrogen: source-backe"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "$schema": "http://json-schema.org/draft-07/schema#",
                  "additionalProperties": false,
                  "properties": {
                    "latitude": {
                      "description": "WGS84 latitude inside the published European coverage.",
                      "maximum": 72.5,
                      "minimum": 34,
                      "type": "number"
                    },
                    "longitude": {
                      "description": "WGS84 longitude inside the published European coverage.",
                      "maximum": 40.5,
                      "minimum": -31.5,
                      "type": "number"
                    }
                  },
                  "required": [
                    "longitude",
                    "latitude"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {},
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type",
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "payment-identifier": {
        "info": {
          "required": false
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "id": {
              "maxLength": 128,
              "minLength": 16,
              "pattern": "^[a-zA-Z0-9_-]+$",
              "type": "string"
            },
            "required": {
              "type": "boolean"
            }
          },
          "required": [
            "required"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-02T17:33:47.73Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T17:33:47.504Z"
    },
    "resource": "https://mitteleuropa.halowerk.com/v1/sk-soil-nitrogen",
    "serviceName": "HALOWERK Central Land",
    "tags": [
      "land",
      "europe",
      "country",
      "sk",
      "soil-nitrogen"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Mean SoilGrids total nitrogen for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Slovakia; results outside it are rejected before payment."
}

What the leaf hashes

{"body":"275c42cb013eee8200052d123e0216d85467b454e0bbaa1b2d8d00512016023c","id":2204135,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646898142514,"prev":null,"subject":"x402_bazaar:https://mitteleuropa.halowerk.com/v1/sk-soil-nitrogen","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. 0xa40047cab579a1b17f23941942fa177de79d8a30ca60129cdfc7031bd94c2b2f
2. 0xe4d05db7ffb942f69bf786908f293dba3c4dbb8aaf8ec08b57bab55eb59eea69
3. 0xb0503e882f7bdda1dd35e27a3fcf9d86738f8f8e188e0e3ac6c6bd82c0b40adb
4. 0x944f5bf528e02fe3608018e063e40d6de44687919a159ed8a315e6bfee05afd0
5. 0x4cf4663ef6615e4d1f3529d39b3ea0e4e4204e7630a79c234c7216cf185021e3
6. 0x53fdd72b2b232988adcf8363c04b486d8f6ac32e5f6ea73669a6969bc9cee5c3
7. 0x6dca72a774b8947113800e932ac973eddff7d1a27672a9da9d34b6625fdb2462
8. 0x94818fa7fe64147a45c46a1010e37618979d2ed6cc4e5c46b609855b756d403b
9. 0x68d728657d2b26a848a358266a31cfa2006520de31420998f653ac7f0f5becb8
10. 0xc645b9915e41007d829c7a8b2940c49694404e8aaa1333beb77dcfeaed91da36
11. 0x9e39e4a17bbc5a7a24664a766933eefa2b6aa75604754bf31c43b4ddf005e28a
12. 0x3b9fa510ea9315fdb1f69663279e291312bab8c2c0d958c0da2bd30894c945a4
13. 0x6959682af8334329ff865c5705b67dd969fc79c93745d2bb5b28573810cfc1f1
14. 0x44d08992eb52b7db0b3504ba234d634742d61c21889da1eb00242ce07e97334b
15. 0x7abf7290721a0b95be706db03c09de9df65bcba8e18ffe4616da43d9c31d6b0a
16. 0x7731256c7406f95d30aabe3bbcb574b72535b9c28e8eb3db363210761a28a6b9
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af