← The evidence ledger
Evidence row 2202264
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://audio-calc.x402tookit.com/bitrate-size
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f1760bfb9f2eb629d51638e92ff72ba4e591581714095b520d9ef6b65551bf2d
- Leaf
- 0xca0d8c19ad0eb70c68e5d55b1c7253a6dc2728b2ee81b9aed72d0583683db6db
What was observed
{
"endpoints": [
[
"x402",
"https://audio-calc.x402tookit.com/bitrate-size"
]
],
"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": "Audio file size from bitrate and duration, or the bitrate or duration it implies; PCM size from rate, depth and channels.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"bitDepth": 16,
"channels": 2,
"sampleRate": 44100,
"seconds": 3600
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T14:38:33.581Z",
"bitrateKbps": 1411.2,
"bytesPerSecond": 176400,
"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.",
"megabytesPerHour": 635.04,
"minutes": 60,
"notChecked": [
"container overhead (WAV header 44 bytes, tags, MP4 or Ogg framing) which adds a small amount",
"variable bitrate (VBR) files, where the average differs from the target",
"…1 more"
],
"pcm": true,
"reasons": [
"Uncompressed PCM: sample rate x bit depth x channels bits per second.",
"That is 176.4 kilobytes per second, or 635.04 MB per hour."
],
"seconds": 3600,
"sizeBytes": 635040000,
"sizeGB": 0.63504,
"sizeGiB": 0.59142709,
"sizeKB": 635040,
"sizeKiB": 620156.25,
"sizeMB": 635.04,
"sizeMiB": 605.621338,
"source": "size = bitrate x duration / 8; PCM bitrate = sample rate x bit depth x channels, computed locally",
"summary": "1411.2 kbps for 3600 s is 635040000 bytes (635.04 MB, 605.621338 MiB).",
"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": {
"bitDepth": {
"description": "PCM bits per sample",
"type": "integer"
},
"bitrateKbps": {
"description": "Compressed bitrate in kilobits per second (1 kbps = 1000 bits/s)",
"type": "number"
},
"channels": {
"description": "Number of channels (default 2)",
"type": "integer"
},
"sampleRate": {
"description": "PCM sample rate in Hz (with bitDepth and channels)",
"type": "number"
},
"seconds": {
"description": "Duration in seconds",
"type": "number"
},
"sizeBytes": {
"description": "File size in bytes (to solve for bitrate or duration)",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"bitrateKbps": {
"type": [
"null",
"number"
]
},
"bytesPerSecond": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"megabytesPerHour": {
"type": [
"null",
"number"
]
},
"minutes": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"pcm": {
"type": [
"boolean",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"seconds": {
"type": [
"null",
"number"
]
},
"sizeBytes": {
"type": [
"null",
"number"
]
},
"sizeGB": {
"type": [
"null",
"number"
]
},
"sizeGiB": {
"type": [
"null",
"number"
]
},
"sizeKB": {
"type": [
"null",
"number"
]
},
"sizeKiB": {
"type": [
"null",
"number"
]
},
"sizeMB": {
"type": [
"null",
"number"
]
},
"sizeMiB": {
"type": [
"null",
"number"
]
},
"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": "2026-11-01T22:36:29.06Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:36:28.774Z"
},
"resource": "https://audio-calc.x402tookit.com/bitrate-size",
"serviceName": "Audio Calc",
"tags": [
"audio",
"bitrate",
"file-size",
"pcm"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Audio file size from bitrate and duration, or the bitrate or duration it implies; PCM size from rate, depth and channels."
}What the leaf hashes
{"body":"f1760bfb9f2eb629d51638e92ff72ba4e591581714095b520d9ef6b65551bf2d","id":2202264,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646814782981,"prev":null,"subject":"x402_bazaar:https://audio-calc.x402tookit.com/bitrate-size","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).
- 0xca0d9fa274b15d9f94989a9a83a4a23464c9003d86c978cf9643ff6a06941018
- 0x8e3860269c1504861fff2fa04c9f54b5d6c71a20d8344f5ff8126ee21e09d6b6
- 0x6c87a671def7e938f8ec2fe95ede3a7d1bb53deda49b1248b4711886f21d72d1
- 0xc6d9f3bae3ed8d254932982aaaade82645a7fd82cb3e8d532e725de5d3e4eef8
- 0x3a2c7b603db75136507b181e8373d4eace796cc9382489263265d7e4eddce00a
- 0x0917167d6a480866e8aeafa92414c3a62a5b76d049e0bbbb9de7295efb605bc4
- 0x84b56040b5eb7ec5b13ed22083267de1e0367e3044c66e911a4f38ff0fce62d7
- 0xdad8f05a852999983f2dbab1672caeb3cf9b02885aef5b82764360d71d82032c
- 0x7c1978813be63fe4706bd18abf4e77715f3a478ba77ffeea2ad9aae36f2c3485
- 0xbbc21dce669a37405c7b7769fbc4342bf596ab61afd38813844b609c16252391
- 0x6b23832f3a8446a604542a7c706facdde5f0d9b98ec755cdbed6879ac111dee0
- 0x89421afe101858fcb12a0b85122bd84839dc9c5772685837be305f90d15dfb5d
- 0x0c0f15fae9c65ebf110db9a83b92aa128ce387de0137888a7863d81f3567dc04
- 0xdfd116d725e076b0e3bd74ff5682dfe6834735313673c580d2e58972567174a0
- 0x5b456020389d8e0ef67f16a492c600b5b88189e59398bba308734db7e873e7e4
- 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af