← The evidence ledger
Evidence row 71332
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://audit.liquidlogicx.com/api/prove
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f0151ee71ca60a69298d68a6ce6a72c850f013788187d94a1697e0df80628a0e
- Leaf
- 0x439d925acb34503dcc7411890e5f7b86dfd694b7ddcf48dca1e87b2dd4c4c651
What was observed
{
"endpoints": [
[
"x402",
"https://audit.liquidlogicx.com/api/prove"
]
],
"name": "Payment Receipt/Settlement Proof",
"owner_address": "0x147991a1c25e78f6d9225d2dba61ed93a6158c7b",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b",
"scheme": "exact"
}
],
"description": "Payment receipt and settlement proof for x402 and agent payments, by Liquid Logic X. Input: a Base USDC tx hash (optional memo). Output: JSON proof recorded onchain on Arc mainnet (proofId, from/to/amount, Arc tx, refId) plus a public verify link anyone can check. $0.02 USDC on Base, charged only when a proof is returned. Your paying wallet must be the tx sender or recipient. Liquid Logic X also records proofs on Tempo mainnet. Site: https://liquidlogicx.com",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"memo": "invoice-42",
"txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c"
},
"type": "http"
},
"output": {
"example": {
"arc": {
"chain": "eip155:5042",
"contract": "0x1de52cbc4490a7873ef007e51cb91a5b374facb1",
"txHash": "0x2bb316073c034140d74d73ca67ad2b71bfaaa9dea531d69290a16efdd0f10bbe"
},
"memo": "llx-self-test-0.001",
"proofId": 1,
"recordedAt": "2026-09-22T15:32:28.000Z",
"refId": "0xe6db5a86740c0e40943c06268bda4e09b45ac0a45fd6c5d7b7f2550e19e0c50e",
"source": {
"amountUsdc": "0.001",
"chain": "eip155:8453",
"from": "0xEA24bafbBAF6d7Ba58bE860EE906f0Fe533d167D",
"timestamp": "2026-09-15T20:38:57.000Z",
"to": "0x147991A1c25e78f6D9225d2dBA61eD93A6158c7b",
"txHash": "0x93a15735c5b82fb8c9fdc0f7db5d56916a14f6ee4ef343000a29fd55c4bcaf4c"
},
"status": "recorded",
"verifyUrl": "https://proofs.liquidlogicx.com/proofs?q=0xe6db5a86740c0e40943c06268bda4e09b45ac0a45fd6c5d7b7f2550e19e0c50e"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"memo": {
"description": "Optional plain-text note stored on-chain with the proof (printable ASCII, max 64 chars). Public.",
"maxLength": 64,
"pattern": "^[\\x20-\\x7E]*$",
"type": "string"
},
"txHash": {
"description": "Base mainnet (eip155:8453) transaction hash of a USDC payment (must contain a Transfer from Base USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). Your paying wallet must be its from or to.",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
}
},
"required": [
"txHash"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"arc": {
"properties": {
"chain": {
"const": "eip155:5042",
"type": "string"
},
"contract": {
"const": "0x1de52cbc4490a7873ef007e51cb91a5b374facb1",
"type": "string"
},
"txHash": {
"description": "Arc tx that recorded the proof",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": [
"string",
"null"
]
}
},
"required": [
"chain",
"contract",
"txHash"
],
"type": "object"
},
"memo": {
"type": "string"
},
"proofId": {
"description": "1-based position in the SettlementProofs registry on Arc",
"type": [
"integer",
"null"
]
},
"recordedAt": {
"type": "string"
},
"refId": {
"description": "Settlement ID on Arc = keccak256(srcTxHash, payee, amountUSDC)",
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
},
"source": {
"properties": {
"amountUsdc": {
"description": "Decimal USDC, e.g. \"0.05\"",
"type": "string"
},
"chain": {
"const": "eip155:8453",
"type": "string"
},
"from": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"timestamp": {
"description": "Base block time (UTC)",
"type": "string"
},
"to": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"txHash": {
"pattern": "^0x[0-9a-fA-F]{64}$",
"type": "string"
}
},
"required": [
"chain",
"txHash",
"from",
"to",
"amountUsdc",
"timestamp"
],
"type": "object"
},
"status": {
"enum": [
"recorded",
"existing"
],
"type": "string"
},
"verifyUrl": {
"description": "Public verifier page on proofs.liquidlogicx.com",
"type": "string"
}
},
"required": [
"proofId",
"status",
"source",
"arc",
"verifyUrl",
"recordedAt"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"s": [
"cdp_sdk_server"
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"maxItems": 11,
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
},
"eip2612GasSponsoring": {},
"erc20ApprovalGasSponsoring": {}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790770824/bazaar-icons/a00cfa28ab21cfd9.png",
"lastUpdated": "2026-10-06T04:48:57.649Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-06T04:48:57.458Z"
},
"resource": "https://audit.liquidlogicx.com/api/prove",
"serviceName": "Payment Receipt/Settlement Proof",
"tags": [
"payment-receipt",
"settlement-proof",
"verify",
"x402",
"usdc"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Payment receipt and settlement proof for x402 and agent payments, by Liquid Logic X. Input: a Base USDC tx hash (optional memo). Output: JSON proof recorded onchain on Arc mainnet (proofId, from/to/amount, Arc tx, refId) plus a public verify link anyone can check. $0.02 USDC on Base, charged only when a proof is returned. Your paying wallet must be the tx sender or recipient. Liquid Logic X also records proofs on Tempo mainnet. Site: https://liquidlogicx.com"
}What the leaf hashes
{"body":"f0151ee71ca60a69298d68a6ce6a72c850f013788187d94a1697e0df80628a0e","id":71332,"kind":"listing","method":"baseline/1","observed_us":1793025481970643,"prev":null,"subject":"x402_bazaar:https://audit.liquidlogicx.com/api/prove","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).
- 0x439de67a22530bbb4cb39ef3a9d95ce7733df21baf234fa602dcb296bb75ba07
- 0x3079b0cd33bf799563f20d2ee668aba699e122465c4646dedcb7b06e02574d75
- 0xf8df1697ec007502a89242d2860acc0cd2ff762c3c6fdafa4e176db6a691e8ab
- 0x6c312ec1f37483c0722cabb7f0a185b04ebcbb9f820c929ac06103c919354a4d
- 0xbfffa4f353994ed117ff839a7fa6ca0d4a568345e393f11fa9645cff175d5942
- 0xa678b1d33150438df06de4bb1a3cab4ae770ddddbdc39a41ab37074d99875831
- 0xcce85cea323e3f0e7c868882242a98b19b5ea813f655dc18e4b22310d22ad030
- 0xa6e362ee770c7ae7cef4e22db3d8a98f0b56006fb6dbbe9130d34643abf5edfb
- 0xa8a432f0247bf1cbe581bfb2fc9b56b36482b7652c02cc81d89053ba073aedbb
- 0xa01b5bca0c214269697f527524974087b06149387d7cbefda814e53051695c9d
- 0x60b91f773fa3c91ef752edc3e72b14aec43590de73fb46a458b7100f8e74b4a7
- 0x2b1b47804e83988d7fd5ed8179b2334f3f43b318109b54142f6c6bd749076f9e
- 0x54b29089c0a3cbbd6ddbe58944696110984dd5f418275cb1b77f957c56da8eab
- 0x8b27a4c21bf4ba962fd008c8f4300bc6953764a5032b9ab0cfe696b318c45326
- 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
- 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
- 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae