Evidence row 2228378

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ostland.halowerk.com/v1/bg-soil-coarse-fragments"
    ]
  ],
  "name": "HALOWERK Eastern 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 coarse-fragment volume for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Bulgaria; results outside it are rejected before payment.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "latitude": 42.6977,
              "longitude": 23.3219
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "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"
            }
          },
          "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": "2026-11-02T17:21:18.905Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T17:21:18.668Z"
    },
    "resource": "https://ostland.halowerk.com/v1/bg-soil-coarse-fragments",
    "serviceName": "HALOWERK Eastern Land",
    "tags": [
      "land",
      "europe",
      "country",
      "bg",
      "soil-coarse-fragments"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Mean SoilGrids coarse-fragment volume for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Bulgaria; results outside it are rejected before payment."
}

What the leaf hashes

{"body":"da98ff8a10a48ab88dbd7da7cd4fcee0fd945c25be7168309ae8083578434963","id":2228378,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793647421664187,"prev":null,"subject":"x402_bazaar:https://ostland.halowerk.com/v1/bg-soil-coarse-fragments","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. 0x618a6cb4d2a8fc69ecd9738d2975ae59d2d9f0deaa6aca55d676f6d045003700
2. 0x77e3627ef2d3a9fd4bba8073c32b0668fa56089014435a47b0a3f2aacfe442f1
3. 0x207dda0860bf17ff7f0283feff3ac8748f4d58a61131bab58a07accbdfc54736
4. 0xf19f60250b50d43b3efd6ddb41d24a0acfd982a0db5d0c828251091462d1dc15
5. 0xea5a07538a8c95f3bf625ca9c8f7936d809985a0ab37efec50f8ef6162ed72e3
6. 0xb386a5c19e085c85354f45df0827d8951db4e3652625352731935b646879f8b0
7. 0x00c6a837594c8979b92755dcb955650fef038d68770ca5f3ebb4e081a39a7542
8. 0x3c0fd334a9fb214d25b4a9ece6787b6d02cdb4decb3f09e5f27c99744d7b4516
9. 0x2e9fe2eb17c32d617a97ab3b3d42bd3f24955f44d36324e8cece7337fddb4a43
10. 0xfd29ab934cca3a53f434c286c8796c5714ce7f9c636aab9fbfd9213b39690ad2
11. 0x396a59d07e6c3bf718735cd3b5976e1b078deed3c26e8cb57113a853b51d400a
12. 0x6b4875590ee8954f5315611ea1c32c35ce609ce69cc5cd56dab438a799f4f825
13. 0xfcf5d9c790c40588489c41a23736feba4efc9e83eda3317c30f53a98ce8d1d89
14. 0x6ae97c2bdc679e3326a739627f6c3a307d7e25e547b9bf23dbf2622fb26d858e
15. 0x23f4763e8db2efe57fbc28dfc68f2b97b65f54a03425994e68157763af649a50
16. 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af