Evidence row 1038962

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/postcode/:postcode"
    ]
  ],
  "name": "Postcode Context",
  "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 Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "postcode": "SW1A1AA"
            },
            "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": "Great Britain 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": "2026-10-29T00:21:45.382Z",
    "quality": {
      "l30DaysTotalCalls": 19,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-29T00:21:48.849Z"
    },
    "resource": "https://api.postcodecontext.uk/api/v1/postcode/:postcode",
    "serviceName": "Postcode Context",
    "tags": [
      "postcode",
      "demographics",
      "property",
      "census",
      "geospatial"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "GET /api/v1/postcode/:postcode - Single Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)"
}

What the leaf hashes

{"body":"9910724dc588fa416c1e72c1493e2dd2143ced0abe6fc80d0fb9863c7dcc6954","id":1038962,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298277150352,"prev":527269,"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 2026-10-29 (242798 rows).

1. 0xd9b1a30fc73f820c5d87551de6692e94206b454ebc6a2ac2380bcdc22cc45c32
2. 0x16aa3bf3efa0370776d652ada96e7c532650993a1d9ceaa9eb881f8436751e7c
3. 0x0ac06bd4835b5660cb949ff92a182c5e9f351387d01bed0c9fcc5bf38ae18cfc
4. 0xc392abab79c88b383ae8cc68c81e3b78b403ff3e15088330bf239cf7c8d85094
5. 0x7e62473e92f40eaaf8f9c9596c9ed443997c043fe8be0179363196d4f4913bd5
6. 0x3c041a6ff37855d5be1bfc5dd76d997c688f9d29a66f0e362e2c6042e8aa0dcd
7. 0x8cd486bd925944ceb6ed677eed8bb5c5ed1c23b6766950c462e177ec1b156339
8. 0xbba6c1f27a744813e5d1cd90981e7d0191d4bba1f3db8ff22b1f3e3b51d0d814
9. 0x91c381364a218b84055e1f78c8f0ac43edb79863db3e10d36ef14d85bdea416b
10. 0x07d55d0d154e5c61b7555ba631093650e8d378757a57394d078c9b79f412a902
11. 0xec6706d13f61f71259971a675d1e6d0681cfd76845bf57d2424af851c810ea5b
12. 0x8522b6d17f15c0c1abc36194c9894bdee4c4687a5eb503bcb0fab90198db90af
13. 0xbab97b696ffe737616975d37e243af07fa246058d99161c165f9f96fde8768ff
14. 0xb75e183026f9112474e3710d846b63188d3bba750c3ad3feabd9a22ee7d080fc
15. 0xa7d3fa0a08edea990614977b51a6b3289c357a88d8ca06dcbfe67415a017c0e7
16. 0xa034ebc8d117fbf1ed466b70baa0478bf213b743e1a41cba1d2da7a9f310184d
17. 0x1597ec94933260048e5e583aff1ad0fd44cc49efcd0a994091ed5db4924d7b02
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1