Evidence row 416631

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-lab.vercel.app/api/postcode/:postcode"
    ]
  ],
  "name": "UK Postcode Lookup",
  "owner_address": "0xd0a3c0f5612ecd88e4b16ef1cd458e1a5e8ffd49",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xd0A3c0f5612EcD88e4b16Ef1cD458e1a5E8FFD49",
        "scheme": "exact"
      }
    ],
    "description": "Location and areas for a Great Britain postcode: latitude and longitude, ward, district, constituency and region, as JSON.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "postcode": ":postcode"
            },
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "constituency": "Cities of London and Westminster",
              "country": "England",
              "district": "Westminster",
              "latitude": 51.50101,
              "longitude": -0.141563,
              "postcode": "SW1A 1AA",
              "region": "London",
              "ward": "St James's"
            },
            "type": "json"
          }
        },
        "routeTemplate": "/api/postcode/:postcode",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "properties": {
                    "postcode": {
                      "description": "Great Britain postcode, with or without the space, any case. Northern Ireland (BT) is not supported.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "postcode"
                  ],
                  "type": "object"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "constituency": {
                      "description": "Westminster parliamentary constituency (2024 boundaries)",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "country": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "district": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "latitude": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "longitude": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "postcode": {
                      "type": "string"
                    },
                    "region": {
                      "description": "English region; null in Scotland and Wales",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "ward": {
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "postcode"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T03:07:31.962Z",
    "quality": {
      "lastCalledAt": "2026-10-27T03:07:31.962Z"
    },
    "resource": "https://x402-lab.vercel.app/api/postcode/:postcode",
    "serviceName": "UK Postcode Lookup",
    "tags": [
      "uk",
      "postcode",
      "geocoding",
      "location",
      "address"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Location and areas for a Great Britain postcode: latitude and longitude, ward, district, constituency and region, as JSON."
}

What the leaf hashes

{"body":"13ed6661cb7fced9394fdb85c316072245339515a9d3b84db0cea0ec45fb53ca","id":416631,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080838755514,"prev":null,"subject":"x402_bazaar:https://x402-lab.vercel.app/api/postcode/:postcode","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x3bb101559a81920dd1d39f132e0098f34d0acf932f1b3d5b45ce5047250e2073
2. 0x40f1189810d9061e611abf9a46ba24d381cfbd8e69fb16873e38a5068a7267c3
3. 0x31d22bbd3f5238c68141c9ad3018c6c3bb8e6246033e41b12a1978d39fe123e8
4. 0x53d2389e4a59cd122d7c093a3e13df43ddd7633152b6278e93f784547546215d
5. 0xda2781e62b284eac0cce239508c5f9d3fb25469a78741f143a604230819ab375
6. 0x41fa608a89b4cea60c6605360bef97116d3935dea88562e572d97ca392764566
7. 0xaa64ed22a08476bb22a3d2e47239cb8a2463f792b9e941ff491364f0bbcfe0af
8. 0x28e461f27579c8c51beebb0f9438774e67e8be2a820f301256c723ace6221f67
9. 0x4b12023111a2282b9f67b28509ca469f78be84a9a5d48c1a3d5c2d4d7e4949f6
10. 0xbc6ac4c6bd6aa1b3c9383de3a25f306e36affcc8010daacc7045df5a7f341285
11. 0x34cd0060c6df900735b6aa88a647d584520104fc04a2c8d5b37d3436121b79cb
12. 0x4add9ebe2bbf86a7a32e3cec38874af82baf38b21fde64a6952bf3d4124e2c7f
13. 0x9e70d944564843a0f0d88b623d628ff2e2ac17c172d4ebe0ed141fe8b9f9dae4
14. 0x42784d9809d120654630ee1b254a1dd90a2bbd3024aa180f1a59bbf53e9316e4
15. 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
16. 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4