Evidence row 278689

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://brain.testnet.usebrainchain.com/x402/tasks"
    ]
  ],
  "name": "BrainChain",
  "owner_address": "0xf848984c8a0d9e49cc9c97380c62b34c6f3b97d1",
  "raw": {
    "accepts": [
      {
        "amount": "1000000",
        "asset": "0x1eC185467cA2D5d1c24f0EdCB91301Bca4d0a787",
        "extra": {
          "assetTransferMethod": "permit2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:46630",
        "payTo": "0xf848984c8A0D9E49Cc9C97380C62b34C6f3b97D1",
        "scheme": "exact"
      },
      {
        "amount": "1000000",
        "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:84532",
        "payTo": "0xf848984c8A0D9E49Cc9C97380C62b34C6f3b97D1",
        "scheme": "exact"
      }
    ],
    "description": "Jev hires a model for your task and grades the result. Rejected work is refunded.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "brief": "Summarise the release note below for a developer in three bullet points.\n\nRelease note: ...",
              "levels": [
                "Accurate, three bullets, covers every change",
                "Accurate with one change missing",
                "Inaccurate or not three bullets"
              ],
              "title": "Summarise a release note"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "order": "0x6d9a…41c2",
              "status": "/x402/tasks/0x6d9a…41c2"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "brief": {
                      "description": "What to produce. Include every fact the model needs; models cannot browse.",
                      "maxLength": 4000,
                      "minLength": 1,
                      "type": "string"
                    },
                    "levels": {
                      "description": "Quality levels, best first. The work is paid if it reaches the second level or better.",
                      "items": {
                        "maxLength": 200,
                        "minLength": 1,
                        "type": "string"
                      },
                      "maxItems": 3,
                      "minItems": 2,
                      "type": "array"
                    },
                    "title": {
                      "description": "One line naming the deliverable.",
                      "maxLength": 120,
                      "minLength": 1,
                      "type": "string"
                    }
                  },
                  "required": [
                    "title",
                    "brief",
                    "levels"
                  ]
                },
                "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": {
                  "properties": {
                    "order": {
                      "type": "string"
                    },
                    "status": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "order",
                    "status"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793019378/bazaar-icons/5de78ef9a94807b0.png",
    "lastUpdated": "2026-10-26T14:51:52.79Z",
    "quality": {
      "l30DaysTotalCalls": 8,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-26T14:51:52.511Z"
    },
    "resource": "https://brain.testnet.usebrainchain.com/x402/tasks",
    "serviceName": "BrainChain",
    "tags": [
      "ai",
      "tasks",
      "grading",
      "llm"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Jev hires a model for your task and grades the result. Rejected work is refunded."
}

What the leaf hashes

{"body":"864e95af380cde60be299dc7cad183fec539f34fbd3314a9951a7438b93e6190","id":278689,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042078521596,"prev":218788,"subject":"x402_bazaar:https://brain.testnet.usebrainchain.com/x402/tasks","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xe3b51bb99c9959cc4746a38873c57d3bbf486a4ab78fb17429f49f083cefdb14
2. 0x791d5378e528728ec545519be3961069c50b264ab0ace5fc07b6319f479dde87
3. 0xde2ce46dc5b9c6a711484e77d1c01d004a401e4250053d0ea33f28fee71a5e86
4. 0x87b1e9f31ed11fbbd1afb8625c639c4b1dd76e93bdbef04d264da473e94c29fd
5. 0xc03f30c15495940e6fc03990afb167bb03590847b309e4f5c5000db77283593c
6. 0x43513e7a1ef6e7896b1cea5ad6732867f27fc083259116609c9423d395255b25
7. 0x96371c280b279791b3a62be4ca6d97b8fd92be37de99ac57047d5da76a878b4d
8. 0xe68bf7eca60595b17044da353fbdf13174529944e058ee02f50dda86e8893f30
9. 0xd64a1531ed43b02a67d87d21ecef0bc1c12b2445722979b0bc983e2c2082ca37
10. 0x249b79bed19d1f9d60c6d935894d3c7f842961834c52c966852cddf05d69629d
11. 0xb545b804be0d2933a674be6ac915c6c6235897d0274e66143aa7cf879b9d86a3
12. 0x8e135936797442c4eea61915f2c9f8f6df06e1322204cd0e6986ada3e54c77cc
13. 0xc0924a0807e534382f518663123231c317124338831a2b310de2c17b09677086
14. 0x9bc5fc98278b9f6dc18c66c6e162aefd5244be03170d41bc5161f58ad11beed7
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae