← The evidence ledger
Evidence row 2202261
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://audio-calc.x402tookit.com/dbfs
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4dab6b655fb9e81b6d03d6ad8d6ccbc2b85e18d333af598b7bdbd6329c7195fe
- Leaf
- 0xc4639c2ad9f832f755fdfd306901c7f3db90e48858e0b3f2f584668d05dfbdb1
What was observed
{
"endpoints": [
[
"x402",
"https://audio-calc.x402tookit.com/dbfs"
]
],
"name": "Audio Calc",
"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": "Convert between linear amplitude and dBFS, and get the RMS level and crest factor of a sine, square, triangle or sawtooth.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"dbfs": -6,
"shape": "sine"
},
"type": "http"
},
"output": {
"example": {
"amplitude": 0.501187234,
"asOf": "2026-10-11T14:38:34.362Z",
"crestFactor": 1.414214,
"crestFactorDb": 3.0103,
"dbfs": -6,
"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.",
"headroomDb": 6,
"notChecked": [
"inter-sample (true) peaks, which can exceed the sample peaks by a dB or more",
"filtered or real-world signals, whose crest factor differs from the ideal shapes",
"…2 more"
],
"percentOfFullScale": 50.118723,
"reasons": [
"6 dB of headroom below full scale.",
"Crest factor = peak / RMS: sine 1.414 (3.01 dB), square 1 (0 dB), triangle and sawtooth 1.732 (4.77 dB)."
],
"rmsAmplitude": 0.354392892,
"rmsDbfs": -9.0103,
"shape": "sine",
"sixteenBitCode": 16422,
"source": "Decibel definition 20 log10(amplitude ratio) and standard waveform RMS values, computed locally",
"summary": "Peak 0.501187 (-6 dBFS); a sine wave at that peak has RMS 0.354393 (-9.01 dBFS) and a crest factor of 3.01 dB.",
"twentyFourBitCode": 4204263,
"verdict": "BELOW_FULL_SCALE"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"amplitude": {
"description": "Linear peak amplitude where 1.0 is full scale (use this, or dbfs)",
"type": "number"
},
"dbfs": {
"description": "Peak level in dBFS (0 or below for undistorted audio)",
"type": "number"
},
"shape": {
"description": "Waveform for RMS: sine (default), square, triangle or sawtooth",
"enum": [
"sine",
"square",
"triangle",
"sawtooth"
],
"type": "string"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"amplitude": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"crestFactor": {
"type": [
"null",
"number"
]
},
"crestFactorDb": {
"type": [
"null",
"number"
]
},
"dbfs": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"headroomDb": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"percentOfFullScale": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"rmsAmplitude": {
"type": [
"null",
"number"
]
},
"rmsDbfs": {
"type": [
"null",
"number"
]
},
"shape": {
"type": [
"null",
"string"
]
},
"sixteenBitCode": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"twentyFourBitCode": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:36:36.522Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:36:36.352Z"
},
"resource": "https://audio-calc.x402tookit.com/dbfs",
"serviceName": "Audio Calc",
"tags": [
"audio",
"dbfs",
"rms",
"crest-factor"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Convert between linear amplitude and dBFS, and get the RMS level and crest factor of a sine, square, triangle or sawtooth."
}What the leaf hashes
{"body":"4dab6b655fb9e81b6d03d6ad8d6ccbc2b85e18d333af598b7bdbd6329c7195fe","id":2202261,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646814774509,"prev":null,"subject":"x402_bazaar:https://audio-calc.x402tookit.com/dbfs","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).
- 0xc463a47fe0d49952f60f720adb391e036930c523e1a7370b808b0942b996bbe6
- 0xb02b59d12e7b5b0ee1717a273e95e854f43f242f023f98a676abde0064b10bd1
- 0xecea11ebb86450bfb8aac3413495b90d2d6f016f06e7d4aabd357260abec79ef
- 0x553fb2cfca5114f3aeffdd34ecd36ae4c97d355fb5ed89ef56918d7a48f77e6b
- 0x5690a101206f688bf15a0243dd99c0a60dc8385e8274288f8cc31d848f784dc5
- 0x74c2d114d9f0b4dfc56b73b255330bf04c8c768039f28707e1c4495d04b2c699
- 0x65c7d511909bcae364af319cd822b1adc6805c91dccf0f3fa1976d217b8f7e0c
- 0x226e686889f6225c67f58d1f51b3cd36e53080665c87bec7d0e86797cb6e2232
- 0x3476a5c3fd6446a01762fa290893320d7baa5fc82d4a51faa7a242c072b6b9fb
- 0x2919b3392ca51039277d24c00919066226b6cbdad7c126f867909d57eb522b81
- 0x40394755209936e28ff905cfb4e1431ad39aad361a3e7d9fc75add7af3ea912f
- 0xe48e5215fb157d5670abc594c0a51b4c0fb5dc5d14ae1acb3119d3200fb933b5
- 0x61ee210f299fdcda2ea75817592c9621ccbd35e0e4358cb705a10dd284df07af
- 0x0b45a0435ea40bcbc48c2b318e8c62aa48a7e6b10e52b4548ada394225a7bd9f
- 0xcbfaf790331071a9b3499a4db6f9d951fe5d04baefda2c66846b52b023ab8ae5
- 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af