Evidence row 1784486

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.howtocancel.ai/v1/changes"
    ],
    [
      "x402",
      "https://api.howtocancel.ai/v1/policy/:slug"
    ]
  ],
  "name": "api.howtocancel.ai",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "api.howtocancel.ai",
    "endpoints": [
      {
        "description": "Dated log of return and cancellation policy changes at major U.S. companies.",
        "method": "GET",
        "parameters": [],
        "pricing": {
          "amount": "0.05",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "The Fine Print",
        "tags": [
          "consumer",
          "policy",
          "changes"
        ],
        "url": "https://api.howtocancel.ai/v1/changes"
      },
      {
        "description": "How to cancel a subscription, or a store's return policy: steps, deadlines, fees, catches, official source and date checked.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "netflix",
            "group": "path",
            "name": "slug",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "The Fine Print",
        "tags": [
          "consumer",
          "returns",
          "cancellation",
          "policy"
        ],
        "url": "https://api.howtocancel.ai/v1/policy/:slug"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "api-howtocancel-ai",
    "integrationType": "",
    "isNew": false,
    "name": "api.howtocancel.ai",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.03",
      "currency": "USDC",
      "maxAmount": "0.05",
      "minAmount": "0.01"
    },
    "provider": "api.howtocancel.ai",
    "providerUrl": "",
    "serviceName": "The Fine Print",
    "tags": [
      "consumer",
      "policy",
      "changes",
      "returns",
      "cancellation"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"ffa9aa567a28548902100091f4e11333a973e07d7ef6d01f0f339814beba77d0","id":1784486,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793557127596727,"prev":null,"subject":"agentic_market:api-howtocancel-ai","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0x8682f5300c2c253d586459cb77ca716d1ca31621d68b99613d520448553a2cae
2. 0x4f9957e6876acd169d9d9f77478aa72de80c4da7007a20aa03459d040a65b0f2
3. 0x84dbe52ba0d268c9bc95c10f0a3048fdc6f96ae94540a5de39a8a4ff220f1b9b
4. 0xc4f68fb2df4a063b9924905f0b60ceeaa4912030022f7b357cdf097d258d725a
5. 0x9fea2adbba2e425579c563ea2291c8b943a4039b41c88cd804e6666b972b1124
6. 0xad9255d672e45a7b1668494c25b5c5158887bb11d19c92282930c226ae949924
7. 0x352e176f6c00015d2d69244d30252be6e44b8ac009f9ee6de66c2e4627f38059
8. 0x5166aec5b1ce80190af06d1147d10f86231489df7788dd8e0a619b13cf3373ef
9. 0xe8e524fdbc82fddbac03b9a3a2f38c3962c5be34660d5e10c7d009067e36d32d
10. 0x514896f1d3c5cfa26ff09edd4ec920dd01255346d0ddd70b01a02bdbb02cb92b
11. 0x3c14145c3894906e29e4eda7f9a76ba0b93a992ec6b20ba7ee2bdf2b67913a30
12. 0x66bc00f0a69d348ec6c3a03e69e80113b1cb2fa1bbb15da1262f59e0be2e416f
13. 0x23a4dc987ee7dc4c8a8ce447e3eb85e80166e6855921cf4fe20a6b0da70c4d2a
14. 0x12d005bd5bab52a5295a7639e02ffa6fa98b5e18753f0f4638b668903af24ab7
15. 0x3950a937c3f98cedf9cbbc2f8905c10e3aac8ebc54b1e3468237d58bb254c496
16. 0xe329dbfb0db2c7f35334e66970a8ee37ee2d3356d34d692c10f84b6f7de65a35
17. 0x0c618c42b286ad61acd8204aa6dcf024b8b041d3759aa585bf4e221abc39cb5d
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90