← The evidence ledger
Evidence row 77223
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://loonie-toll.onrender.com/provider
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 6a766b4db34f55b9b919a470e567447d6f5d2ed2fab7d688698cfd83b0bb35f9
- Leaf
- 0xbe9e17863fed745e01f8ebe350598e51edfff71cd127fad4ca69c824831b191e
What was observed
{
"endpoints": [
[
"x402",
"https://loonie-toll.onrender.com/provider"
]
],
"name": "ClearCheck",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "30000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Verify a US healthcare provider by NPI or name: real, active, what they practice, and where they practice.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"npi": "1215930367"
},
"type": "http"
},
"output": {
"example": {
"disclaimer": "Advisory only, provided as is without warranty of accuracy or completeness. NPPES records provider self-attestation and does not confirm that a licence is current or unencumbered — verify with the rel…",
"matchCount": 1,
"reasons": [
"Dr. LAURENT GRESSOT is an active individual registrant, primary specialty Internal Medicine, Hematology & Oncology."
],
"results": [
{
"credential": "M.D.",
"enumeratedOn": "2005-05-23",
"lastUpdated": "2014-11-25",
"licenseNumber": "H6257",
"licenseState": "TX",
"name": "Dr. LAURENT GRESSOT",
"npi": "1215930367",
"otherSpecialties": [
"Specialist"
],
"practiceAddress": "17323 RED OAK DR, HOUSTON, TX, 770901243",
"practicePhone": "281-440-5006",
"primarySpecialty": "Internal Medicine, Hematology & Oncology",
"primaryTaxonomyCode": "207RH0003X",
"soleProprietor": "NO",
"status": "ACTIVE",
"type": "Individual"
}
],
"retrievedAt": "2026-09-17T16:24:34.805Z",
"source": "CMS NPPES NPI Registry",
"verdict": "ACTIVE"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"firstName": {
"description": "Provider first name",
"type": "string"
},
"lastName": {
"description": "Provider last name, or organization name",
"type": "string"
},
"limit": {
"description": "Max matches to return, default 5",
"type": "integer"
},
"npi": {
"description": "10-digit National Provider Identifier",
"type": "string"
},
"state": {
"description": "Two-letter state code, e.g. FL",
"type": "string"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"disclaimer": {
"type": [
"null",
"string"
]
},
"matchCount": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"results": {
"items": {
"properties": {
"credential": {
"type": [
"null",
"string"
]
},
"enumeratedOn": {
"type": [
"null",
"string"
]
},
"lastUpdated": {
"type": [
"null",
"string"
]
},
"licenseNumber": {
"type": [
"null",
"string"
]
},
"licenseState": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"npi": {
"type": [
"null",
"string"
]
},
"otherSpecialties": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"practiceAddress": {
"type": [
"null",
"string"
]
},
"practicePhone": {
"type": [
"null",
"string"
]
},
"primarySpecialty": {
"type": [
"null",
"string"
]
},
"primaryTaxonomyCode": {
"type": [
"null",
"string"
]
},
"soleProprietor": {
"type": [
"null",
"string"
]
},
"status": {
"type": [
"null",
"string"
]
},
"type": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"retrievedAt": {
"type": [
"null",
"string"
]
},
"source": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-20T21:16:06.686Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-20T21:16:06.45Z"
},
"resource": "https://loonie-toll.onrender.com/provider",
"serviceName": "ClearCheck",
"tags": [
"government-data",
"compliance",
"verification",
"public-records",
"risk-screening"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Verify a US healthcare provider by NPI or name: real, active, what they practice, and where they practice."
}What the leaf hashes
{"body":"6a766b4db34f55b9b919a470e567447d6f5d2ed2fab7d688698cfd83b0bb35f9","id":77223,"kind":"listing","method":"baseline/1","observed_us":1793025493481875,"prev":null,"subject":"x402_bazaar:https://loonie-toll.onrender.com/provider","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).
- 0xbe9e59268bafdd81c65b4e378baf15dbd005024fb6fa6e2be2f3a82b20e80e44
- 0x7e0361efa609a4e90b963da5ca40f3f1aff6f073b02aedddbdda74d93c677a41
- 0x90b62edf600f7886c437759040d30666f564354c60312028a7424fe0068935a2
- 0x73ca41c3659ad8fa69e7a17d1ed43ac940a2ef18f2442332b6402399867f3356
- 0xc34b7db2a27bc94a2f2af494ce8d867976fb087dcdfb911a433299e29592bd66
- 0x3a1afdb5fc3d591e2a7a8a70d0e72406210de10cc339fb2de34abf173753931a
- 0x84db278fbf43d4c3fdfa3b789679ba4665229ee4d90a07973545ec8112801e81
- 0x474235b8ac74d4190ef02a855e160e1833f32972a52b8eb91ba8b6badad53129
- 0x652682fe7730588966bee5677a3da0d5301eeb9628ec4a456398914b9ddf92e6
- 0x6a746b816cbae6dd852b6174fa370c7d8224f421d42164fa99d1a244739599d1
- 0x0c2fadf69af6b0b6e19a10cc8f6ddfdff26662d74207cc53dcbcf5abfbdbc8c9
- 0xa6f71fd6c3a59323bf7c5386a54935b14c555d8c717289cc73700f56d86994cd
- 0xd5b5bb5812612371a70171b2252d90e95bb0581ea5a3be198122adc8442e4f79
- 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
- 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae