Evidence row 117691

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://opendata402.com/v1/air/eu"
    ]
  ],
  "name": "opendata402",
  "owner_address": "0x295aa6c5a3460a0f8755823c8ee7bbc7caf79fb1",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 30,
        "network": "eip155:8453",
        "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 30,
        "network": "eip155:137",
        "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 30,
        "network": "eip155:42161",
        "payTo": "0x295AA6c5a3460A0f8755823C8eE7bBC7CAf79fb1",
        "scheme": "exact"
      }
    ],
    "description": "Latest hourly air quality measurements (NO2, PM10, PM2.5, ozone) from about 3,000 official monitoring stations in Europe (European Environment Agency, up-to-date unvalidated data, refreshed hourly): nearest stations to a location, or all stations of a country, with station type (traffic, background, industrial), area, value, unit and measurement hour. Use it for health, travel and environment questions. EEA, CC BY 4.0.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "lat": "52.37",
              "lon": "4.89",
              "radius_km": "15"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "count": 1,
              "stations": [
                {
                  "area": "urban",
                  "country": "NL",
                  "distance_km": 1.2,
                  "measurements": {
                    "no2": {
                      "hour_end": "2026-10-14T10:00:00.000Z",
                      "unit": "ug.m-3",
                      "value": 38.5
                    }
                  },
                  "station": "NL00014",
                  "type": "traffic"
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "country": {
                      "description": "ISO country code instead of a location.",
                      "pattern": "^[A-Z]{2}$",
                      "type": "string"
                    },
                    "lat": {
                      "description": "Latitude.",
                      "pattern": "^-?[0-9]{1,2}(\\.[0-9]{1,6})?$",
                      "type": "string"
                    },
                    "limit": {
                      "description": "Max stations (default 10, max 20).",
                      "pattern": "^([1-9]|1[0-9]|20)$",
                      "type": "string"
                    },
                    "lon": {
                      "description": "Longitude.",
                      "pattern": "^-?[0-9]{1,3}(\\.[0-9]{1,6})?$",
                      "type": "string"
                    },
                    "pollutant": {
                      "description": "Only stations measuring this pollutant.",
                      "enum": [
                        "no2",
                        "pm10",
                        "pm25",
                        "o3"
                      ],
                      "type": "string"
                    },
                    "radius_km": {
                      "description": "Search radius in km (default 25, max 200).",
                      "pattern": "^([1-9]|[1-9][0-9]|1[0-9][0-9]|200)$",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-14T22:14:18.432Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-14T22:14:17.941Z"
    },
    "resource": "https://opendata402.com/v1/air/eu",
    "serviceName": "opendata402",
    "tags": [
      "air-quality",
      "pollution",
      "europe",
      "eea",
      "environment"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Latest hourly air quality measurements (NO2, PM10, PM2.5, ozone) from about 3,000 official monitoring stations in Europe (European Environment Agency, up-to-date unvalidated data, refreshed hourly): nearest stations to a location, or all stations of a country, with station type (traffic, background, industrial), area, value, unit and measurement hour. Use it for health, travel and environment questions. EEA, CC BY 4.0."
}

What the leaf hashes

{"body":"57b6dc95ce43c93549d3cb4ba28c0ed9340779e3148a42f051f71cd558da352d","id":117691,"kind":"listing","method":"baseline/1","observed_us":1793025611785045,"prev":null,"subject":"x402_bazaar:https://opendata402.com/v1/air/eu","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xb8c45ff963c64fcbcdfb4d3a826e156988dfba4cb4a2ffc5b108f9a0d96aba05
2. 0xde0f23def24e42abf0594065d4fbeb726da08dcae6d51af7edbd7c8ea38f8bb2
3. 0x325c9fe9dfd08f55299ec4447e25b4c6330650c1c6a494eb43ce9cb8cb832e00
4. 0x546ee93a708c8e2367e6baf384064e22fea39425a2f61c18c2a127b119d15272
5. 0xc155f24d0a4ad576b9c6c2fd324cc241974a4b6beee42ef9a18151a8334c5b46
6. 0x6d932ad1660db93d39aefeaa5d9dd8438a0ac7f93fecddafdd1678ee9224310c
7. 0xba3d423fd8cb120c91dad6d27030ea385e14164a545929bb3d0f07c49b8477df
8. 0x3bb49657ba9f9874d29731256da0cb43dc3a56093998f316a5a1c44770aa9e94
9. 0x3e22965437ad0de1b511721c0d328319e39da6fec796fed49f0bbfb4d3539221
10. 0x258835beede438ebebc963b639363480e6d4ea3839ccb62aeaaad82cefc2fe04
11. 0xcf50b54d8921f0c22877e0b8d6b8393a1954218f000f7cac374e9f40a024f700
12. 0xb6efd79902cac6d5a402ebecb8069402f00961ab80cd71b4d647fbc686d975ec
13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae