← The evidence ledger
Evidence row 2201212
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://security-math.x402tookit.com/checksum
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e9f2667f5819f3a5b2216fd746ea32d01ca070024ac8eac243ad52242e4a26ad
- Leaf
- 0xa5ef05e9c408ab31ad81c46f65545fa3dc90f97510d80d186d3cd580342fbcf9
What was observed
{
"endpoints": [
[
"x402",
"https://security-math.x402tookit.com/checksum"
]
],
"name": "Security Math",
"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": "CRC-32, CRC-32C, Adler-32, FNV-1/1a (32 and 64 bit) and MurmurHash3 x86_32 of text or hex bytes. Not cryptographic.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"algorithm": "all",
"data": "123456789"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T14:38:13.010Z",
"byteLength": 9,
"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.",
"hexInput": "313233343536373839",
"notChecked": [
"security: none of these resists deliberate collisions; never use them to verify authenticity or store passwords (use SHA-256 or better for integrity against attackers)",
"other variants of the same names (CRC-16, CRC-64, Murmur2, MurmurHash3 x64_128, xxHash)",
"…1 more"
],
"reasons": [
"Non-cryptographic checksums and hashes: they catch accidental corruption and spread keys across buckets, but anyone can forge a matching value.",
"Hex output is big-endian (most significant byte first); CRC-32 matches zlib and PNG, CRC-32C matches iSCSI and ext4.",
"…1 more"
],
"results": {
"adler32": {
"decimal": "152961502",
"hex": "091e01de"
},
"crc32": {
"decimal": "3421780262",
"hex": "cbf43926"
},
"crc32c": {
"decimal": "3808858755",
"hex": "e3069283"
},
"fnv1-32": {
"decimal": "605325334",
"hex": "24148816"
},
"fnv1-64": {
"decimal": "12047124837835544278",
"hex": "a72ffc362bf916d6"
},
"fnv1a-32": {
"decimal": "3146166556",
"hex": "bb86b11c"
},
"fnv1a-64": {
"decimal": "492395637191921148",
"hex": "06d5573923c6cdfc"
},
"murmur3-32": {
"decimal": "3036607362",
"hex": "b4fef382"
}
},
"secure": false,
"source": "computed locally (published algorithms)",
"summary": "9 bytes: crc32 cbf43926, adler32 091e01de, fnv1a-32 bb86b11c, murmur3-32 b4fef382.",
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"algorithm": {
"description": "One of crc32, crc32c, adler32, fnv1-32, fnv1a-32, fnv1-64, fnv1a-64, murmur3-32 or all (default)",
"type": "string"
},
"data": {
"description": "Text (UTF-8) or, with inputType=hex, bytes written as hex (up to 4000 characters)",
"type": "string"
},
"inputType": {
"description": "text (default) or hex",
"type": "string"
},
"seed": {
"description": "MurmurHash3 seed, 0 to 4294967295 (default 0)",
"type": "number"
}
},
"required": [
"data"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"byteLength": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"hexInput": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"results": {
"properties": {
"adler32": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"crc32": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"crc32c": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"fnv1-32": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"fnv1-64": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"fnv1a-32": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"fnv1a-64": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
},
"murmur3-32": {
"properties": {
"decimal": {
"type": [
"null",
"string"
]
},
"hex": {
"type": [
"null",
"string"
]
}
},
"type": [
"null",
"object"
]
}
},
"type": [
"null",
"object"
]
},
"secure": {
"type": [
"boolean",
"null"
]
},
"source": {
"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": "2026-11-02T04:08:16.635Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:08:16.389Z"
},
"resource": "https://security-math.x402tookit.com/checksum",
"serviceName": "Security Math",
"tags": [
"checksum",
"crc32",
"fnv",
"murmurhash",
"adler32"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "CRC-32, CRC-32C, Adler-32, FNV-1/1a (32 and 64 bit) and MurmurHash3 x86_32 of text or hex bytes. Not cryptographic."
}What the leaf hashes
{"body":"e9f2667f5819f3a5b2216fd746ea32d01ca070024ac8eac243ad52242e4a26ad","id":2201212,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646801293217,"prev":null,"subject":"x402_bazaar:https://security-math.x402tookit.com/checksum","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).
- 0xa5eed8ac1450ef956772a3e31b380cb820626812b33aff35bd0b86e7aaa2d394
- 0xdf29b923eea5a161ec5d37175070beaabfaa564e3f02df7c1577ba6398b0f410
- 0xe1d15474646bfab55000052e4d42720728ddb74c101103e28aecdd4e6de93537
- 0xd6b0623e5a02b3a61321c3805b02d143e2e1d7f80bea1c27c02eec955122e9f3
- 0xed6431f48664ff8313c384b88060c6cd4b6ee32536653ebb979df78732c5da6d
- 0xc3f1a36164a8329105d00d56867e3fc19ed4c485dee139e57fac4cebe792611f
- 0xfd6b31b157810b97a6a70f2ffdde0b1eec55b07e01f2b4e6ee68df13b147a422
- 0x30e9c374b94fa8f2cb77047d34ac6fa1ce9b4e027c01e51db65a5fb850067248
- 0x99338e8c724a4ec61bc166a1a1d6d0ad48a835f885ec8b89d7d0d6a1cc7b86f2
- 0xa92c709762ce23df79c34c3f6628d5a3afe07cf9733cd18b14a3224e047ae876
- 0xa04075991c97d7aaf70f4b871aaa795b50aa88f0aad78b9cf55ce19bd543b03a
- 0x4c4f4cb682e94e3751eaa1fa136fc04582c4d9d8eb377f4fef8bb9a5f3e31983
- 0xec9b01ce49e2dd688fa78781733c888976342aaf0672176098d6561858941ddd
- 0x7a6e52c5cebe3ec69d18cc200885d32108ba1be1b19f2da2ead8becbf3db3cb1
- 0x7abf7290721a0b95be706db03c09de9df65bcba8e18ffe4616da43d9c31d6b0a
- 0x7731256c7406f95d30aabe3bbcb574b72535b9c28e8eb3db363210761a28a6b9
- 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af