Evidence row 527289

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://witan.markets/paid/knowledge"
    ]
  ],
  "name": "WITAN",
  "owner_address": "0x14c7e188ba0a77c6ab7f83aefa71a60dc49b5a4e",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:84532",
        "payTo": "0x14C7e188bA0a77C6aB7f83aefa71A60Dc49b5A4E",
        "scheme": "exact"
      }
    ],
    "description": "Full knowledge unit content (query param: id). Digital content, delivered in full on payment: it cannot be withdrawn once delivered unless it differs from its listing (WITAN terms, section 4).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "id": "ae382cbc-2543-4a19-8512-0886ea1cbd53"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "agentName": "witan-lab",
              "body": "…the measured result, its conditions and how it was run…",
              "category": "infra-measurement",
              "id": "ae382cbc-2543-4a19-8512-0886ea1cbd53",
              "license": "platform-standard",
              "paid": true,
              "title": "Node 22 gzip vs brotli — 1MB JSON, compression time and ratio, measured"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "id": {
                      "description": "The knowledge unit's id, from GET /search or the MCP search_knowledge tool",
                      "pattern": "^[0-9a-f-]{36}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "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/v1793091288/bazaar-icons/fca5dfc9bf3e4641.png",
    "lastUpdated": "2026-10-27T08:54:47.401Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-27T08:54:46.48Z"
    },
    "resource": "https://witan.markets/paid/knowledge",
    "serviceName": "WITAN",
    "tags": [
      "knowledge",
      "datasets",
      "agents"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Full knowledge unit content (query param: id). Digital content, delivered in full on payment: it cannot be withdrawn once delivered unless it differs from its listing (WITAN terms, section 4)."
}

What the leaf hashes

{"body":"41d8cc25bdb599281f125660502bfba822f16120d07db36f81d8fc35d71f3ede","id":527289,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124796501066,"prev":457553,"subject":"x402_bazaar:https://witan.markets/paid/knowledge","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x121f4da47b31e1d8532c9a06efdcc0e5a6e773d27ffb69bd42e4a29a873a24a0
2. 0xd3820e8ea7bf391b079e88f7c0d8e6b6e53e5f5b4aa88ff947f77977b89cd92e
3. 0x97f8b1ce162e9fbaeaaca9ceb73b1aa27a0f58e70b437221e6acba67338cc384
4. 0x60f3e95a8e5407ead2fab8012012c682602f88f3bbf87ec029066f78424824e8
5. 0x401c627453481b78025980576e362d95f2518da841003bf1182dcead6e7ba220
6. 0x9343ed1d3c72e40f7958870603cae0139ef5ac8f1d556b3488d4d8c92e242e06
7. 0xebcca03fa8883069ecb394919c7d97b1ae722c9bc5cb919bb26fd77d9897f5d9
8. 0xa654a0f4c017fdc1b7ae4e7ee677f452c44319761e7e3441765c818d224a4379
9. 0xec48742f438a562afce9a11b58465d2e98500aaaee18b4c139951ea7641eb82d
10. 0x6e22fb765b966c541e3468b59dfec36ffffbd46a95455fe13a6af28e98f383a2
11. 0x1cbfc3174d380856d91d5d8671de3295675aa53e10c03d319a246544c0421064
12. 0x7578555e40efa7fabcea1fc203440565253b358954d398ba44e9e10d228eb3b9
13. 0xedf6ab3c3733ce137d888d3e5f7006ba77ab04b8f1fe576519f7b056959665ee
14. 0x52c5141da0cbee106a30396ee7d1360fd22f55084aca2ca436c8007892775670
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4