Evidence row 457553

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 Digital content, delivered in full on payment: it cannot be withdrawn once delivered unless it differs from its listing (WITAN terms, section 4).",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": {
      "lastCalledAt": "2026-10-27T08:54:47.401Z"
    },
    "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":"28b10a21e8ae1bc1e96945eb01f8945411029bb14adad086ce2d5d9220bdc281","id":457553,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100975290714,"prev":null,"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. 0x49d486ecc9bf44ec14c4d3c1dd74631a059be97d309abdd8c85c9028c69f6ed1
2. 0xa85350672ba63e3e29b3eda00cdbd459b33f8817bb513467aa9278527fa61cff
3. 0x293b9d13b31b0ba2c3d1b0409f451992d54b4257fc03159be5ca6c9655508013
4. 0xc4a919671ff8de94b1e2abf7f78416919a7248a108fcaad86fb1b0754693c9b0
5. 0x38a71d83260f6ed7cbe5c94f3edf7b4f95536190b0f348f355d554b8ee999324
6. 0x4d2ca7af5875f327e1aa508b9d304063d5a79dad369b2aa3f311776536608da0
7. 0x07521ff92055f782ff7630493ce76565b31ff681fd341ff097efc278555269a0
8. 0x918e2cfc4503923075ed37bc4e77da4127f0cddceba65a38413ee8b11989e763
9. 0xdc245ee3f64b125c5b5c815c91f7fa4cae2c66f7ec82b7d8b5587498f7e9d6dc
10. 0xb10850e339c5cf611e925dab76011103589037f8925a4c500fe5fd647316ac9c
11. 0xf38b609ad597fce93b27c195650b896689a01ed74ab6b03ca25db0fce3815293
12. 0xa6ea35fd4950cdcd8e7e5b8dcbb37883deca6fa621672fcdbde7ee38017f71bb
13. 0x150dc531eedad3837a4be47dd0bf1a84bf98feb63216c125982425fda525a3fd
14. 0x80ede9e5d428e39db26928b1d08254ff1241f1d7e091fd2e57130fbb4423162b
15. 0x2c117b27721eea45f6590fbccb471d21a7b0b079a53f089ecb300c63bdb3aebf
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4