Evidence row 2204368

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://baltikum.halowerk.com/v1/pl-elevation"
    ]
  ],
  "name": "HALOWERK Baltic Land",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "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": "3000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "6pXwvPgqduMSx33GP8jiVCanpUhZZiPPyG784mNJ7q1Z",
        "scheme": "exact"
      }
    ],
    "description": "Bilinear surface elevation from Copernicus DEM GLO-30. The coordinate is validated against the Natural Earth boundary for Poland; results outside it are rejected before payment.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "latitude": 52.2297,
              "longitude": 21.0122
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "authoritative_status": "preliminary_non_binding",
              "category": "country",
              "charged": false,
              "checked_at": "2026-10-23T02:05:21.647Z",
              "confidence": 0.87,
              "confidence_method": "Conservative minimum source-family basel",
              "data_date": "2015-12-31T23:59:59.000Z",
              "evidence_classification": "derived_from_open_geodata",
              "generated_at": "2026-10-23T02:05:21.647Z",
              "result": "measurement_available",
              "risk_level": "not_applicable",
              "service": "pl-elevation",
              "service_id": "eli-0201",
              "status": "success",
              "summary": "Poland: Elevation: source-backed screeni"
            },
            "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": "2026-11-02T17:16:54.464Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T17:16:54.23Z"
    },
    "resource": "https://baltikum.halowerk.com/v1/pl-elevation",
    "serviceName": "HALOWERK Baltic Land",
    "tags": [
      "land",
      "europe",
      "country",
      "pl",
      "elevation"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Bilinear surface elevation from Copernicus DEM GLO-30. The coordinate is validated against the Natural Earth boundary for Poland; results outside it are rejected before payment."
}

What the leaf hashes

{"body":"63c0fdf9d3a449f07542855dea911755b2f02aa5040b17927b0ceece98bc453c","id":2204368,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646901148971,"prev":null,"subject":"x402_bazaar:https://baltikum.halowerk.com/v1/pl-elevation","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. 0x0a313f0b6716a1e770b9e09a01399446c1a654020e4017b0fda723f33be2c083
2. 0x30942e1f2a7b6fa75c4edb1ce1bcfd4eadb47799f84544c087b2339418bc2898
3. 0xf9b3a902248fac51d1da98931e152aa5f680e44eb40176b395e2188087349c56
4. 0x8b98ef1daba8379b2fed7bfd57c6c51eaafccf5d34ffa3ea74202eb0f4d9438d
5. 0xd8748080169c1992353ea49ffaf185345b4ab25228e4fe131405717e5cb4d3da
6. 0xc39f33f502ba7d4b96ad85e42ca38a5362a80af479c6c04320b7e4dfe29f9b07
7. 0x53aad2ecf23c25843b73b4c0f7d7f3c859933347ac3cf6afe675c0a75388d015
8. 0x0c583d7e217813445de6221285cc27e037a783aec1284a7fe53b36381bbc0aa9
9. 0xfa0f7c3277d5caf0b39be3848b6e1c9fb72b467059038abe83021881258a0d5c
10. 0x64fc97d4e3d7c819decde042b7669e1b1b82790d3dbb3414c0467bf0bd1a8483
11. 0x67e9434c07fc27dc1669722bc134f5ca1405927b485eaffba8c1654fcabde437
12. 0xdf47e0cc4403f66d6bef47c126a44c433909825c77c1bee9446c38e921ef2628
13. 0x0e3de14ede58ca786386b84fae42b353877b05ffc635f390b0d80c2d2342d8ad
14. 0xdd12fe6a2b0c972fe8b92369b1535a7d883c9e1085b61ddaf4130d8880afad75
15. 0xd82979c12a2aae44121bb6058b3364b3a3cbc9be411e35ab0208df5ed56f65d4
16. 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
17. 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af