Evidence row 2201686

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://land-survey.x402tookit.com/flood-zone"
    ]
  ],
  "name": "Land Survey Screening",
  "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": "FEMA flood hazard zone at a US latitude and longitude: high-risk (A/AE/V), moderate or minimal, with base flood elevation.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "lat": 25.7617,
              "lon": -80.1918
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T03:48:08.909Z",
              "baseFloodElevationFeet": 12,
              "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.",
              "lat": 25.7617,
              "lon": -80.1918,
              "notChecked": [
                "map date and pending revisions",
                "local drainage and stormwater flooding",
                "…2 more"
              ],
              "overlappingZones": 1,
              "reasons": [
                "Special Flood Hazard Area: at least a 1% annual chance of flooding (the 100-year flood). Flood insurance is mandatory for federally backed mortgages.",
                "Flood maps are updated infrequently; the official determination is a FEMA flood zone determination or an elevation certificate."
              ],
              "source": "FEMA National Flood Hazard Layer (this product is not endorsed by FEMA)",
              "sourceUrl": "https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer",
              "specialFloodHazardArea": true,
              "summary": "25.7617, -80.1918: FEMA zone AE, base flood elevation 12 ft: high risk SFHA.",
              "verdict": "HIGH_RISK_SFHA",
              "zone": "AE",
              "zoneSubtype": null
            },
            "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"
                      ]
                    },
                    "baseFloodElevationFeet": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "lat": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "lon": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "overlappingZones": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "sourceUrl": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "specialFloodHazardArea": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "zone": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "zoneSubtype": {}
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:32:41.083Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:32:40.902Z"
    },
    "resource": "https://land-survey.x402tookit.com/flood-zone",
    "serviceName": "Land Survey Screening",
    "tags": [
      "flood-zone",
      "fema",
      "real-estate"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "FEMA flood hazard zone at a US latitude and longitude: high-risk (A/AE/V), moderate or minimal, with base flood elevation."
}

What the leaf hashes

{"body":"b2fedfd29062e126b9b4d796f3b1b69ffd59405be4a0cf8515e4c9da6fdbc028","id":2201686,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646807862265,"prev":null,"subject":"x402_bazaar:https://land-survey.x402tookit.com/flood-zone","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. 0xf6cc707002fd2acdf010faadb5e460414f9c2de6738d3c00e38f0a10afca2d42
2. 0x7a2c11d85f31d7b1e3ad68e01d91fa42a414c8a84e178b5241a6a416e95ddca1
3. 0xe6a040e34d39246a41bfbfc8cb2d2505beb7b0b3198d73e27d9faff0ae085543
4. 0x788c3a7a0facaa983f3309760d3c5d094564e1a98721292b0b9097aad5788e4b
5. 0x42eb59311a20ee49018a526eed91e91fcdbaab38b67486884c59b826db0beb67
6. 0xa99bf7675ea9b04390c848c1ccdf539b2820a4f0827c05be4d6842587bb8f95f
7. 0x03283bb8e3b30e55f9586ffe605b8cd8f377d3b95fd3bb7edbd3d3b5dcac4d59
8. 0xae16f498a2f0ffb2af3f19cab71bfaead4b62010deec39eb0be2c48cec2e9dd1
9. 0x41f8189cd030103dfedc8e3ad1fbc63a98e316a6b4093b45080f59798d9653e0
10. 0xa2eafd5b4819d0b957b3cc5a22f6a9e706ea45414210299c0a017c165ccedd08
11. 0xe03551390664c866a473b64b9eae116c9a78f6f78142b79842ced3f53920dfd8
12. 0x93c9b5204cb75374db0fc8940c7bb2dfc4f17b307130f5a55adb819570fd792c
13. 0x54a66ecba86fe13527453978f73a6a3d80e1817889872b25f2a79c90d4b86982
14. 0x70f4b5a4c6a4de9977aecf5fbe7497e271e9e2f9e5068c7dad5953e8fe898b30
15. 0x4068a4306db47ea0eae5f76e5137753caa3dbb132dca6a61a4d6c1838a52700f
16. 0x25127db2e775737b2874f6a159f7c1bf984317eea6482e94589c3ef4c5ccab32
17. 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
18. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af