Evidence row 2201926

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://environment-screen.x402tookit.com/air-quality-now"
    ]
  ],
  "name": "Environment Screen",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Current PM2.5, PM10, ozone, NO2, US AQI and European AQI with category for a latitude and longitude.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "lat": 40.7128,
              "lon": -74.006
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-21T00:33:14.616Z",
              "carbonMonoxide": 202,
              "concentrationUnit": "μg/m³",
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "europeanAqi": 42,
              "europeanAqiBand": "Moderate",
              "gridLat": 40.699997,
              "gridLon": -74,
              "nitrogenDioxide": 29.2,
              "notChecked": [
                "real monitor (AirNow/PurpleAir) readings: this is CAMS model output",
                "NowCast averaging: the AQI is Open-Meteo's own hourly value",
                "…1 more"
              ],
              "ozone": 43,
              "pm10": 8.1,
              "pm2_5": 7.7,
              "reasons": [],
              "source": "Open-Meteo Air Quality API (CAMS model)",
              "sourceUrl": "https://open-meteo.com/en/docs/air-quality-api",
              "sulphurDioxide": 1.6,
              "summary": "Modelled US AQI 57 (Moderate) at 40.699997,-74, local time 2026-10-20T20:00.",
              "time": "2026-10-20T20:00",
              "usAqi": 57,
              "usAqiCategory": "Moderate",
              "verdict": "MODERATE"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "lat": {
                      "description": "Latitude",
                      "type": "number"
                    },
                    "lon": {
                      "description": "Longitude",
                      "type": "number"
                    }
                  },
                  "required": [
                    "lat",
                    "lon"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "carbonMonoxide": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "concentrationUnit": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "europeanAqi": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "europeanAqiBand": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "gridLat": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "gridLon": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "nitrogenDioxide": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "ozone": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "pm10": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "pm2_5": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "sourceUrl": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "sulphurDioxide": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "time": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "usAqi": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "usAqiCategory": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:52:33.497Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-01T22:52:33.255Z"
    },
    "resource": "https://environment-screen.x402tookit.com/air-quality-now",
    "serviceName": "Environment Screen",
    "tags": [
      "air-quality",
      "aqi",
      "pm25",
      "environment"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current PM2.5, PM10, ozone, NO2, US AQI and European AQI with category for a latitude and longitude."
}

What the leaf hashes

{"body":"8176da5e8d3ffc55b6c8869422990f171bc4b3b5cd2eefc96ec5c364729b69b2","id":2201926,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810226402,"prev":null,"subject":"x402_bazaar:https://environment-screen.x402tookit.com/air-quality-now","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. 0xb757460ec9eeee831b094a88440681c59a490c57b7379f6cac61b2281dd9dcde
2. 0xdaf5d35b4788d63b8af47b438d385996624e05705ce8d887fe013d273e3678e0
3. 0x3dec91d77895884976f2e9d957d737e7fefc8869b0a6db404155b99abf26c8d3
4. 0x9d7e3f351c832aec85de31e57e3a15aeb80e65039adb8f3366a8fb181de893ad
5. 0xdc2623b0b8dd15023ab126bbe4f6b514f9a4d849b5d1b4ed9bbe0e27b23e7992
6. 0x73fa49b34642727183864c0b8a48748cebceb673e39950d5fbde775bb44d3196
7. 0x6b2421defecea21b19e26456531dffafb2e222741917be206ecdff09c8b24a56
8. 0xae211e66ebe5e22b829698159b57f9b988eb5023cc44c9919b68e52be1e0a5cf
9. 0x6cd24e7738599e97cb8695b3e4c5a73e60b022f6521b33aa1abdd3ac3b7d5363
10. 0x0f9f26b8506c284e2197e4d91f21cba7b9a0f009dc5b733d94f7d450dc77ed03
11. 0x2baaf56994f40f69d6e4622eada4b0cdaf5e4b3766e25b2769e9cdcb7eeebe1f
12. 0x1e746a5fe19cb9ec0a19b0ddff5c240ad1117a5db0999c1e01fe8f1235d88e30
13. 0x030e61e00342e920981555e2e665fa5ec4a741b10a078f282daa829896c87583
14. 0x08da04eef748b7ac08271324db18913501d72c52afa240bf3f08b6da46e3b97f
15. 0x834b6b9a36b42da183e2542785e8d2d7548ace455268a81922edbe6020cef644
16. 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af