← The evidence ledger
Evidence row 417806
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://market.datapackvibe.com/x402/assistant-ib26-education-12-184
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 43cef637a6a2daac1ab28352dd2d8e18f3e9f8e5cac31cc65e911ef94fb761fa
- Leaf
- 0xf475a663919c74544c0a5a9fad5ee35bed6959dc9cc610371a3d1650dce98d03
What was observed
{
"endpoints": [
[
"x402",
"https://market.datapackvibe.com/x402/assistant-ib26-education-12-184"
]
],
"name": "market.datapackvibe.com/x402/assistant-ib26-education-12-184",
"owner_address": "0x8bc2aecdd86097f74a1a5fa17764108d9a683c8c",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x8bc2AECdD86097F74a1a5fa17764108D9a683C8C",
"scheme": "exact"
}
],
"description": "Learning resource usage — Two-measure correlation + Explicit missing-value fill: Two-measure correlation + Explicit missing-value fill for supplied learning resource usage records (access_count, resource_minutes). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"field": "access_count",
"method": "median",
"rows": [
{
"access_count": 10,
"course_group": "group-a",
"date": "2026-10-01",
"resource_minutes": 1,
"row_id": "row-1"
},
{
"access_count": 20,
"course_group": "group-b",
"date": "2026-10-02",
"resource_minutes": 2,
"row_id": "row-2"
},
{
"access_count": 15,
"course_group": "group-a",
"date": "2026-10-03",
"resource_minutes": 3,
"row_id": "row-3"
},
{
"access_count": 30,
"course_group": "group-b",
"date": "2026-10-04",
"resource_minutes": 4,
"row_id": "row-4"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"files": [],
"order_id": "ord_example",
"result": {
"completed": true,
"workflow": "ib26-education-12-184"
},
"sku": "assistant-ib26-education-12-184",
"status": "delivered"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"field": {
"default": "access_count",
"enum": [
"access_count",
"resource_minutes"
],
"type": "string"
},
"method": {
"default": "median",
"enum": [
"zero",
"mean",
"median"
],
"type": "string"
},
"rows": {
"default": [
{
"access_count": 10,
"course_group": "group-a",
"date": "2026-10-01",
"resource_minutes": 1,
"row_id": "row-1"
},
{
"access_count": 20,
"course_group": "group-b",
"date": "2026-10-02",
"resource_minutes": 2,
"row_id": "row-2"
},
{
"access_count": 15,
"course_group": "group-a",
"date": "2026-10-03",
"resource_minutes": 3,
"row_id": "row-3"
},
{
"access_count": 30,
"course_group": "group-b",
"date": "2026-10-04",
"resource_minutes": 4,
"row_id": "row-4"
}
],
"items": {
"additionalProperties": false,
"properties": {
"access_count": {
"maximum": 1000000000000,
"minimum": -1000000000000,
"type": [
"number",
"null"
]
},
"course_group": {
"default": "",
"maxLength": 80,
"type": "string"
},
"date": {
"default": "",
"maxLength": 10,
"pattern": "^\\d{4}-\\d{2}-\\d{2}$",
"type": "string"
},
"resource_minutes": {
"maximum": 1000000000000,
"minimum": -1000000000000,
"type": [
"number",
"null"
]
},
"row_id": {
"default": "",
"maxLength": 80,
"minLength": 1,
"type": "string"
}
},
"required": [
"row_id",
"course_group",
"date",
"access_count",
"resource_minutes"
],
"type": "object"
},
"maxItems": 200,
"minItems": 1,
"type": "array"
}
},
"required": [
"rows",
"field",
"method"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-27T00:56:15.775Z",
"quality": {
"lastCalledAt": "2026-10-27T00:56:15.775Z"
},
"resource": "https://market.datapackvibe.com/x402/assistant-ib26-education-12-184",
"tags": [
"ai",
"learning",
"workflow"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Learning resource usage — Two-measure correlation + Explicit missing-value fill: Two-measure correlation + Explicit missing-value fill for supplied learning resource usage records (access_count, resource_minutes). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows."
}What the leaf hashes
{"body":"43cef637a6a2daac1ab28352dd2d8e18f3e9f8e5cac31cc65e911ef94fb761fa","id":417806,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080852761117,"prev":null,"subject":"x402_bazaar:https://market.datapackvibe.com/x402/assistant-ib26-education-12-184","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (273461 rows).
- 0xf475db874e28f2b682add19e036b1ec53a2af8fc6f107f350e8b71f0a2fef795
- 0x656270546dcd7376a206b70842937036f0c009a0c9011f7697d7e781634b1132
- 0xc1f49a09bced76140abf7304db6d9dc3eb599858604db5179202020c996a4fde
- 0x967e772190c1f699dfa163e5c5e69b481b98f6babfc2c87dccaba9c86db335a4
- 0x3dd86cbedc3a8e5cf6a05239de3fbafffba7353332621c48208fec45ebb74db9
- 0xc30052aac9c192cccae639009e40a89788a99725a8e995bd9e4beababdaa0c05
- 0xe4feaba641c0f946adb2cf3405e1c633dd611fe71192e3bd38e1abb165ce59f9
- 0x89903512924cd7cb6100bb6d6c3d49c7164003575617d05aae9e5076f1f4e686
- 0x71012f09cddc6f5709d9f5c32dab81124f36abe5bc5aa5dca1f9a2801df5d2ab
- 0x7ee2077cc5ce2f02a1c96750fb3cd8cc6733d62aa9ced705f57c7a5995526139
- 0xd7e1d15523cb9df856351d9c5d85a0e7b6456e5dbec143452707410c827472e5
- 0xd80cea574304ef1eee7c8b03c1efcaf66eb83498acb1756c4e37eb1d063b48be
- 0x47993ad5e402c748d96928c5127292d12f5f590d15cf544698f6bb348ad7dc9b
- 0xce1471491ffb52101d7cd9884cca0fb37a9496f6e8250375054907d24a35d04f
- 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
- 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
- 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
- 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
- 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
- Day root
- 0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
- Chained
- 0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
- Published
- On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4