Evidence row 218931

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://brain.usebrainchain.com/x402/tasks"
    ]
  ],
  "name": "BrainChain",
  "owner_address": "0xafb0c4ef895d4895040cdc6435b96d3ee8350c6e",
  "raw": {
    "accepts": [
      {
        "amount": "1000000",
        "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
        "extra": {
          "assetTransferMethod": "permit2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:4663",
        "payTo": "0xafB0C4Ef895D4895040cdC6435B96D3EE8350c6E",
        "scheme": "exact"
      },
      {
        "amount": "1000000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xafB0C4Ef895D4895040cdC6435B96D3EE8350c6E",
        "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": "2026-10-26T14:10:50.403Z",
    "quality": {
      "lastCalledAt": "2026-10-26T12:59:51.769Z"
    },
    "resource": "https://brain.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":"f3ee680caacbe5fba10b342115e988ada2aca54b60bca9b25aa10b351f2c6c8c","id":218931,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793026654922245,"prev":null,"subject":"x402_bazaar:https://brain.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. 0xd83cd65fa0d52a623e936c6f92767754804be04713e388e54f6547b5aafbac0f
2. 0xadca4781962aad6411d1228789ce8a3a954bb9de8ff7e607e299ee361dab83e5
3. 0xe621d7f6ba17431257a3c6891cca5bb3a78c076645529bf282ca3479eefb7497
4. 0xcfbacb3313b4139b7841b5d81d2333fb7099c22a9ce47022c3a7c42f7c29e548
5. 0xd0e1e27cece4e255062b2675911ef6a501d46a5e5f2acd819bb0ceee7e76e4dd
6. 0x9597773ce336d73adf0d83466439e7c4886c90af75ed574fa9476136e8c878ce
7. 0xd9bc405dcac5c95d6e26a3d74b9e0783bbd99ec2de855382eebe76d9f4e5df5e
8. 0x5f413c94bce5ca3155ae3825bc0b30a8412f4bd8204b0c471c165742e6c0cb0e
9. 0x9754378ea7ac1d291fd46f945e1a2ad82fa1ca5e9d27632f20194abae2857dfc
10. 0x60bb9965ad3bbe169d5f64f7e3edfb9a565192c04e9f5f80c664e2fefe04706e
11. 0x2671a86f48dece064e871ca46396549de6c07bd09915bed27b7ac95a735127fd
12. 0x07e91966e8a0c43a0725bd3d523259064a93333c2900e6171b69ffbfd9f423f1
13. 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae