← The evidence ledger
Evidence row 2201821
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://uk-open-data.x402tookit.com/postcode-lookup
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b6592e78293dd2b475e9aa62dba5bdbe5846a154675508f1ea757481bf22d30c
- Leaf
- 0x6b6297abb1883f1feff7e7d07132c9b0bf569f13ac807bb6956c18a605aef2f6
What was observed
{
"endpoints": [
[
"x402",
"https://uk-open-data.x402tookit.com/postcode-lookup"
]
],
"name": "UK Open Data",
"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": "Look up a UK postcode: coordinates, council, ward, constituency, region and police force area; flags terminated postcodes.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"postcode": "EC1A 1BB"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T00:44:03.977Z",
"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.",
"notChecked": [
"whether anyone lives or receives post at this postcode (this is geography, not Royal Mail delivery data)",
"the coordinates are for the postcode's centre, not a building"
],
"postcodeInfo": {
"constituency": "Islington South and Finsbury",
"country": "England",
"county": null,
"district": "Islington",
"eastings": 531073,
"incode": "1BB",
"introduced": "198410",
"lat": 51.524567,
"lon": -0.112017,
"lsoa": "Islington 022F",
"northings": 182317,
"outcode": "EC1A",
"parish": "Islington, unparished area",
"policeForceArea": "Metropolitan Police",
"postcode": "EC1A 1BB",
"quality": 1,
"region": "London",
"terminated": null,
"ward": "Clerkenwell"
},
"reasons": [],
"source": "postcodes.io (ONS / Ordnance Survey open data)",
"sourceUrl": "https://postcodes.io",
"summary": "EC1A 1BB is in Islington, London (51.524567, -0.112017).",
"verdict": "FOUND"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"postcode": {
"description": "UK postcode with or without the space, e.g. EC1A 1BB",
"type": "string"
}
},
"required": [
"postcode"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"postcodeInfo": {
"properties": {
"constituency": {
"type": [
"null",
"string"
]
},
"country": {
"type": [
"null",
"string"
]
},
"county": {},
"district": {
"type": [
"null",
"string"
]
},
"eastings": {
"type": [
"null",
"number"
]
},
"incode": {
"type": [
"null",
"string"
]
},
"introduced": {
"type": [
"null",
"string"
]
},
"lat": {
"type": [
"null",
"number"
]
},
"lon": {
"type": [
"null",
"number"
]
},
"lsoa": {
"type": [
"null",
"string"
]
},
"northings": {
"type": [
"null",
"number"
]
},
"outcode": {
"type": [
"null",
"string"
]
},
"parish": {
"type": [
"null",
"string"
]
},
"policeForceArea": {
"type": [
"null",
"string"
]
},
"postcode": {
"type": [
"null",
"string"
]
},
"quality": {
"type": [
"null",
"number"
]
},
"region": {
"type": [
"null",
"string"
]
},
"terminated": {},
"ward": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"reasons": {
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:24:23.912Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T23:24:23.731Z"
},
"resource": "https://uk-open-data.x402tookit.com/postcode-lookup",
"serviceName": "UK Open Data",
"tags": [
"uk",
"postcode",
"geocoding",
"postcodes-io"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Look up a UK postcode: coordinates, council, ward, constituency, region and police force area; flags terminated postcodes."
}What the leaf hashes
{"body":"b6592e78293dd2b475e9aa62dba5bdbe5846a154675508f1ea757481bf22d30c","id":2201821,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646809028157,"prev":null,"subject":"x402_bazaar:https://uk-open-data.x402tookit.com/postcode-lookup","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0x6b6292601f73563649814fb022d7f7ce4a4fd71be444109aa242503759cd9966
- 0x0823f722849af4ce2e3ad0a4c031273fc93ad5f784670ca6e0e91890693e86cd
- 0xd28c95bd590686aaba9b51985bf84184d54d6fb19ab8fa81109ce4bc0f5240e2
- 0x86f8bf44f395867441028ef6aec86d00310f3a29056c663862bf447eb60756b0
- 0xccac86b6baf72064a67e2ecdaafe2e00fd6b1e48a68b7929d1c407fd0b6fa901
- 0x608d3d33a0eb1b986c75a49713e577079155126ae9a071afe49f7f8a4b187d5f
- 0x0ef63a05958f396de12b4f7badde0bbad7092f246c5fca6c8a6bf7c18b194631
- 0xc6323656ea31f4099eac0e61a680b6a17cfd7a2d31bd99a403b1fcb1ba8d0234
- 0x35cece818d16254cab986c910a209414181f11c1a6f6f23380b6c71f06eae15a
- 0xf900446f59033e1f1eb01c88f1af22af60227a9cbc8e74106604eb08cf726905
- 0x59ed6181c6d21d79e5ec3723115021e04af859256880f3ae566406f3464592f6
- 0xf0699dc3af903ce279fe702ae5cea714fed874298365bd17acc077a30e99efea
- 0x2fd2d9cf947c79681f19cce7449a6b4b73c256ceadacecd526a729734fb1339d
- 0x197bc18a6b8126dd9b52133f001dca55646ad9292aafa98222498ec1746809a4
- 0x2cdc73dde4ed839d7482b6b91833e64bef56c7626db8439f3bbdfcffd2ae32a3
- 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
- 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
- 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af