← The evidence ledger
Evidence row 72318
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://chess402.vercel.app/api/user
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- aa00785d1707078c03b6ef88e27f9e8a364d74e96b0cc9e3266626dd7041f2bd
- Leaf
- 0xc4246bc3509bb72a1a019dc5ed615c74dd8932bd2216df9a31a4c7b52ca1a248
What was observed
{
"endpoints": [
[
"x402",
"https://chess402.vercel.app/api/user"
]
],
"name": "chess402.vercel.app/api/user",
"owner_address": "0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f",
"raw": {
"accepts": [
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f",
"scheme": "exact"
}
],
"description": "Lichess user profile snapshot: ratings per perf, country, title, online status, counts.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"username": "DrNykterstein"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"count": {
"all": 10450,
"draw": 2450,
"loss": 2000,
"rated": 9800,
"win": 6000
},
"createdAt": 1389027719000,
"id": "drnykterstein",
"online": false,
"patron": false,
"perfs": {
"blitz": {
"games": 1234,
"prog": 12,
"prov": false,
"rating": 3153,
"rd": 45
},
"bullet": {
"games": 5678,
"prog": -5,
"prov": false,
"rating": 3243,
"rd": 40
},
"rapid": {
"games": 89,
"prog": 0,
"prov": false,
"rating": 2881,
"rd": 60
}
},
"playTime": {
"total": 1234567,
"tv": 0
},
"profile": {
"flag": "NO"
},
"seenAt": 1700000000000,
"title": "GM",
"url": "https://lichess.org/@/DrNykterstein",
"username": "DrNykterstein"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"description": "Lichess user profile lookup.",
"properties": {
"username": {
"description": "Lichess username (case-insensitive).",
"maxLength": 30,
"minLength": 2,
"pattern": "^[A-Za-z0-9_-]+$",
"type": "string"
}
},
"required": [
"username"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": {},
"description": "Lichess user profile snapshot.",
"properties": {
"count": {
"additionalProperties": {},
"description": "Game count breakdown.",
"properties": {
"all": {
"description": "Total games.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"bookmark": {
"description": "Bookmarked games.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"draw": {
"description": "Draws.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"import": {
"description": "Imported games.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"loss": {
"description": "Losses.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"rated": {
"description": "Rated games.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"win": {
"description": "Wins.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
}
},
"required": [
"all",
"rated",
"win",
"loss",
"draw"
],
"type": "object"
},
"createdAt": {
"description": "Account creation timestamp (ms epoch).",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"flair": {
"description": "User flair emoji slug.",
"type": "string"
},
"id": {
"description": "Lowercase Lichess user id.",
"type": "string"
},
"online": {
"description": "Whether the user is online now.",
"type": "boolean"
},
"patron": {
"description": "Whether the user is a Lichess patron.",
"type": "boolean"
},
"perfs": {
"additionalProperties": {
"additionalProperties": {},
"properties": {
"games": {
"description": "Total games played.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"prog": {
"description": "Rating progression (last 12 games).",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"prov": {
"description": "Whether the rating is provisional.",
"type": "boolean"
},
"rating": {
"description": "Current rating.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"rd": {
"description": "Rating deviation.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
}
},
"required": [
"games",
"rating"
],
"type": "object"
},
"description": "Per-variant performance objects keyed by perf name (bullet, blitz, rapid, classical, puzzle, …).",
"propertyNames": {
"type": "string"
},
"type": "object"
},
"playTime": {
"additionalProperties": false,
"description": "Cumulative play time.",
"properties": {
"total": {
"description": "Total seconds played on Lichess.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"tv": {
"description": "Seconds streamed on Lichess TV.",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
}
},
"required": [
"total",
"tv"
],
"type": "object"
},
"profile": {
"additionalProperties": {},
"description": "Free-form profile fields set by the user.",
"properties": {
"bio": {
"description": "User biography.",
"type": "string"
},
"firstName": {
"type": "string"
},
"flag": {
"description": "ISO 3166-1 alpha-2 country code.",
"type": "string"
},
"lastName": {
"type": "string"
},
"links": {
"description": "User-provided links.",
"type": "string"
}
},
"type": "object"
},
"seenAt": {
"description": "Last activity timestamp (ms epoch).",
"maximum": 9007199254740991,
"minimum": -9007199254740991,
"type": "integer"
},
"title": {
"description": "FIDE title (GM, IM, FM, ...), if any.",
"type": "string"
},
"url": {
"description": "Lichess profile URL.",
"type": "string"
},
"username": {
"description": "Display username.",
"type": "string"
}
},
"required": [
"id",
"username"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-25T21:57:54.09Z",
"quality": {
"l30DaysTotalCalls": 7,
"l30DaysUniquePayers": 4,
"lastCalledAt": "2026-10-25T21:57:53.951Z"
},
"resource": "https://chess402.vercel.app/api/user",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Lichess user profile snapshot: ratings per perf, country, title, online status, counts."
}What the leaf hashes
{"body":"aa00785d1707078c03b6ef88e27f9e8a364d74e96b0cc9e3266626dd7041f2bd","id":72318,"kind":"listing","method":"baseline/1","observed_us":1793025485630945,"prev":null,"subject":"x402_bazaar:https://chess402.vercel.app/api/user","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0xc424566b272b28cb58151c3b4b171feb82ce35873f0fb8c63f2f2b37c3058d16
- 0x2f4c1d081b0a878597848ef28f2ef58707c47cb529d27c1e05bac2a59d720660
- 0xc9b2e07d9d9ad49b84d9c8dffca341808a652d187facded001558dd71847968e
- 0xa1725e5d08cd5eef93c5800f8931dc01600765eef109fbc528e28258e8792657
- 0x34b6c6b60e0ab9da78624bc8b4e5eb48c7e05d15d179a60eb3f97c909ef03e57
- 0x3693e855efc3dba98e64bd17b6312d24f007ef2672364a543f429c7b3c8375f0
- 0x46e4201347a2ae9e553af1c49b5e0772af42e33b8a84cc1a903456cc9d4a416e
- 0xc484790e8aa9239e603a13888e56f56947e4d374461876ba4ce38064311de32b
- 0xb27d4aa33f64f45fa7d713149f17d13b2ee30393cc7a102b9a52040296e5cde5
- 0xdc850e305944c852a3843d2749ca3439ee04fdbf864b6a8660cc3fd8b5aced96
- 0x2cd92a66ffb802d7ebc327d20fe07925be80289ee1c2910e6818dc40c67f2487
- 0x63002f2569d43725bbf2d04d90ec9e6cf925c96b6dda5e7e220ecfbdd9c2444d
- 0x641fba1f23ec69d96721e34ace1926954d835b9614cb5eae215a069c056399b8
- 0xdbe2e8dd65ea1248b2936612538f18268abd5cf27ebdab3737694571ad496004
- 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae