Evidence row 2202825

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://euroland.halowerk.com/v1/europe-soil-silt-parcel"
    ]
  ],
  "name": "HALOWERK Europe Land",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "6000",
        "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": "6000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "6pXwvPgqduMSx33GP8jiVCanpUhZZiPPyG784mNJ7q1Z",
        "scheme": "exact"
      }
    ],
    "description": "Mean SoilGrids silt fraction for the 0-5 cm layer. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "polygon": [
                [
                  7.095,
                  51.895
                ],
                [
                  7.105,
                  51.895
                ],
                [
                  7.105,
                  51.905
                ],
                [
                  7.095,
                  51.905
                ]
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "authoritative_status": "preliminary_non_binding",
              "category": "europe-wide",
              "charged": false,
              "checked_at": "2026-10-23T02:05:33.432Z",
              "confidence": 0.75,
              "confidence_method": "Conservative minimum source-family basel",
              "data_date": "2020-05-01T00:00:00.000Z",
              "evidence_classification": "derived_from_open_geodata",
              "generated_at": "2026-10-23T02:05:33.432Z",
              "result": "measurement_available",
              "risk_level": "not_applicable",
              "service": "europe-soil-silt-parcel",
              "service_id": "eli-0800",
              "status": "success",
              "summary": "Europe Topsoil silt: parcel sample: sour"
            },
            "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": {
                    "polygon": {
                      "description": "WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees.",
                      "items": {
                        "additionalItems": false,
                        "items": [
                          {
                            "maximum": 40.5,
                            "minimum": -31.5,
                            "type": "number"
                          },
                          {
                            "maximum": 72.5,
                            "minimum": 34,
                            "type": "number"
                          }
                        ],
                        "maxItems": 2,
                        "minItems": 2,
                        "type": "array"
                      },
                      "maxItems": 100,
                      "minItems": 3,
                      "type": "array"
                    }
                  },
                  "required": [
                    "polygon"
                  ],
                  "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": "2026-11-02T17:24:42.65Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T17:24:42.432Z"
    },
    "resource": "https://euroland.halowerk.com/v1/europe-soil-silt-parcel",
    "serviceName": "HALOWERK Europe Land",
    "tags": [
      "land",
      "europe",
      "europe-wide",
      "soil-silt"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Mean SoilGrids silt fraction for the 0-5 cm layer. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries."
}

What the leaf hashes

{"body":"db5ba57d01405bd5b92e1a46d8fa2a0f9fc2130c9112cc9c6e83c4cb25aa13bc","id":2202825,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646875588109,"prev":null,"subject":"x402_bazaar:https://euroland.halowerk.com/v1/europe-soil-silt-parcel","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. 0xb1f141b10b31afe21a186f766f54509e01f523bd80e85b2e82a342ed5ea1ad4c
2. 0xd48a3d898815e105c6487ffc88abc01cb1c5db90fb1c55bbd6912323fa640bec
3. 0xff3ac003ed0c9fa741f0e9898630bfdfaef5d9ab3ff31ca06a5d6e0e2ad0a068
4. 0x40dea7cd099948198c4b53fca178c9b865aca296c84b204832e56caca7ec7f10
5. 0x6b2f8b160b82a38118a80e50ad614eb27d8e9785548584059bdd108565bc8921
6. 0x781d191d7d5f5fc82e6025faea9ec1e1157ef98033f38ba2dad91a61da005ca9
7. 0xe2ffaf718aac314a52d02234682d44988fa7d3744395c037bf1186d8622f32df
8. 0xcf224cc3677257beff2214f0f28431381f612ba26a9f810269ae886f384c419a
9. 0xa769e44465828e77a4dd0922e582b24812f2e1730efa168b8ca93ba1057a86b3
10. 0x8f4ec337211676b43d28160b98f1b90af0ac49215326dd3b9e37f7b2cfa687a0
11. 0xf92920bdc51539b59094cfbb80f72e8b029c1c3406e3ff8cd9d811e2cfb67f08
12. 0x5a16d9a413a0d0f13ba2cfc534ad3f57d0c3d4b675ce737e9827e56f932e79d3
13. 0xf214768748b83271814cb189e6d8ee47b2a524b5f96a73f108b1dc6771b128e1
14. 0x2f8469a138f90dfcfc93d4f817bc8f20341a871e08f629fe27a2cd40dbfeb340
15. 0x793184605629cd36ba80a07cbe115ca35e8923297bf024260c6f5c06b255f638
16. 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af