Evidence row 452344

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/postcode/:postcode"
    ]
  ],
  "name": "Postcode Context UK",
  "owner_address": "0x8ab7568ac097523e81a94644235fcf19a2b85670",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x8ab7568ac097523e81a94644235fcf19a2b85670",
        "scheme": "exact"
      }
    ],
    "description": "GET /api/v1/postcode/:postcode - Single UK Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD 2019 deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "postcode": "M11AE"
            },
            "queryParams": {
              "format": "json",
              "view": "full"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "deprivation_deciles": {
                "_scale_explanation": "1 = Most Deprived 10% in nation, 10 = Least Deprived 10%",
                "crime_safety_decile": 4,
                "imd_overall_decile": 8
              },
              "location": {
                "clean_postcode": "SW1A1AA",
                "latitude": 51.501009,
                "local_authority": "Westminster",
                "longitude": -0.141588,
                "lsoa_code": "E01004736",
                "outcode": "SW1A",
                "postcode": "SW1A 1AA",
                "region_or_nation": "London"
              },
              "property_and_energy": {
                "dominant_property_type": "Flat/Maisonette",
                "epc_rating_current": "C",
                "median_house_price_gbp": 1250000,
                "price_per_sqm_gbp": 14200
              },
              "summary_for_ai": {
                "affluence_score_100": 94,
                "affluence_tier": "Ultra-Prime",
                "ai_context_briefing": "Affluent urban postcode in Westminster (SW1A 1AA) with median property values of GBP 1,250,000, low deprivation (IMD Decile 8), and 89.4% gigabit broadband.",
                "commuter_connectivity_score_100": 99,
                "family_suitability_score_100": 62,
                "primary_persona_tag": "Metro Elite & Civic Core",
                "property_value_index": 98
              }
            },
            "type": "json"
          }
        },
        "routeTemplate": "/api/v1/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": {
                      "default": "SW1A1AA",
                      "description": "UK postcode (e.g. SW1A 1AA, BB7 3BB)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "postcode"
                  ],
                  "type": "object"
                },
                "queryParams": {
                  "properties": {
                    "format": {
                      "default": "json",
                      "enum": [
                        "json",
                        "flat",
                        "csv"
                      ],
                      "type": "string"
                    },
                    "view": {
                      "default": "full",
                      "description": "Slice target view: full, summary (~80 tokens), property, or demographics",
                      "enum": [
                        "full",
                        "summary",
                        "property",
                        "demographics"
                      ],
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "pathParams"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792929344/bazaar-icons/9d2de4e5c0743e69.jpg",
    "lastUpdated": "2026-10-27T09:22:45.966Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-25T11:55:46.622Z"
    },
    "resource": "https://api.postcodecontext.uk/api/v1/postcode/:postcode",
    "serviceName": "Postcode Context UK",
    "tags": [
      "uk-postcode",
      "demographics",
      "property",
      "census",
      "geospatial"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "GET /api/v1/postcode/:postcode - Single UK Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD 2019 deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)"
}

What the leaf hashes

{"body":"7ac8ae2d335ca1322bae84c02c2ecaf1185c8129bbd9526dceecf3406edf785a","id":452344,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100520616936,"prev":68113,"subject":"x402_bazaar:https://api.postcodecontext.uk/api/v1/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. 0x0376ace8e6d71415edecece0af9369e09c59276ab765ed47372725878eb9cbcb
2. 0x44989160032b52d2cef844b1e211d59abdaa664eb3eb7d572c699c928f89d03f
3. 0xb23452d4b2328cc53a572fcbc85ce1a63d1682633a7dc2c3ee07b3d0a86c7c7a
4. 0xf1fd8a577fb5f1eeba0c74bd743ab7c4a178ca40808f523d8b146b696a7ea52a
5. 0x284e56ac0fe0a536957b0ff667121506a3675aa70ec60ad6b0c19daa0cbdfa6a
6. 0x3e1f973ff1bb029c4e2b5aa42dfe3fda0b6f8a2f595f5673a050c8d66e4b78f3
7. 0x918a902eda8c53b6d29fabfb2c72dfab596093bdc968005c679b8db65c2f934f
8. 0x4ce0e086bc5a11061df3cc85618738956c15c76f94424f504faf9c41e47f6281
9. 0xef8d69675931668c4d7fdc6763b443487aa862d7aa75341d1b8ffc8bc69c8e0d
10. 0x4f51aa4fbe1c66521c58ff8a79b969308a92af83c3dfa439dc3d45be02e035e3
11. 0xb428d1c0ffbb1f2e74ff7e62f152f655db4bd1935bbdcbefa7286b1094075929
12. 0x05916cc6b98491a0d541e4ecca3d0132fa255184243406b5a8a52bb1b6b63bd0
13. 0x5b34b9f89512a83faa4bfecec322037670cc1af58e6e94a86fe88934434d7ddf
14. 0x29e12cb67839430fa64ab8bd05d52bab606f2978d9e6d2fb094fece9438fd4de
15. 0x2cf27e8a181d60d0dd27c186c2eddfcbb4e8fa71cf66feeb55a4d730e15ee8c4
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4