← The evidence ledger
Evidence row 2201248
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://physics-calc.x402tookit.com/blackbody
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 372f84d8931a7d6062ad03ba87350e9241ef607594dfd6d9291a27c7739535f7
- Leaf
- 0x8bfdc5b979e1b4433a242dc046cf511f8136813f6cccaf9338beb9ded7c2da72
What was observed
{
"endpoints": [
[
"x402",
"https://physics-calc.x402tookit.com/blackbody"
]
],
"name": "Physics Calculators",
"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": "Blackbody radiation: Wien peak wavelength and frequency, Stefan-Boltzmann power per area, and total power for an area or sphere.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"radiusM": 695700000,
"temperatureK": 5772
},
"type": "http"
},
"output": {
"example": {
"areaM2": 6082104400000000000,
"asOf": "2026-10-11T08:56:11.700Z",
"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.",
"emissivity": 1,
"notChecked": [
"the real emissivity, which varies with wavelength and surface (stars and planets are not perfect blackbodies)",
"absorbed or reflected incoming radiation: this is emission only, not a net heat balance",
"…1 more"
],
"peakBand": "green",
"radiantExitanceWM2": 62938592.5,
"reasons": [
"Wien: lambda_max = 2.897771955e-3 m K / T. Stefan-Boltzmann: M = emissivity x sigma x T^4, sigma = 5.670374419e-8 W/m2/K4 (CODATA 2018).",
"The wavelength peak and the frequency peak are different points of the same curve."
],
"sigma": 5.670374419e-8,
"source": "computed locally",
"summary": "At 5772 K the emission peaks at 502.04 nm (green) and radiates 62938600 W per square metre. Over 6082100000000000000 m2 that is 3.82799e+26 W.",
"temperatureK": 5772,
"totalPowerW": 3.8279909e+26,
"verdict": "COMPUTED",
"wienB": 0.002897771955,
"wienPeakFrequencyHz": 339331595000000,
"wienPeakWavelengthM": 5.02039493e-7,
"wienPeakWavelengthNm": 502.03949
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
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"enum": [
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],
"type": "string"
},
"queryParams": {
"properties": {
"areaM2": {
"description": "Radiating area in m2, for total power",
"type": "number"
},
"emissivity": {
"description": "Emissivity 0 to 1 (default 1, an ideal blackbody)",
"type": "number"
},
"radiusM": {
"description": "Or the radius of a sphere in metres (area = 4 pi r^2)",
"type": "number"
},
"temperatureK": {
"description": "Surface temperature in kelvin, 1 to 1e9",
"type": "number"
}
},
"required": [
"temperatureK"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
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"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"areaM2": {
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"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"emissivity": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"peakBand": {
"type": [
"null",
"string"
]
},
"radiantExitanceWM2": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"sigma": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"temperatureK": {
"type": [
"null",
"number"
]
},
"totalPowerW": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"wienB": {
"type": [
"null",
"number"
]
},
"wienPeakFrequencyHz": {
"type": [
"null",
"number"
]
},
"wienPeakWavelengthM": {
"type": [
"null",
"number"
]
},
"wienPeakWavelengthNm": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:07:25.475Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:07:25.254Z"
},
"resource": "https://physics-calc.x402tookit.com/blackbody",
"serviceName": "Physics Calculators",
"tags": [
"physics",
"blackbody",
"thermal-radiation",
"temperature",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Blackbody radiation: Wien peak wavelength and frequency, Stefan-Boltzmann power per area, and total power for an area or sphere."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af