Evidence row 58955

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://fourzerotwo.si/mcp"
    ],
    [
      "web",
      "https://fourzerotwo.si/"
    ]
  ],
  "name": "fourzerotwo",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-11T18:28:34.058378Z",
        "status": "active",
        "statusChangedAt": "2026-10-11T18:28:34.058378Z",
        "updatedAt": "2026-10-11T18:28:34.058378Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "400+ data APIs for agents: UK companies, property, trade, tenders, recalls, sanctions. Free tier",
      "name": "si.fourzerotwo/data",
      "remotes": [
        {
          "headers": [
            {
              "description": "Optional free key from https://fourzerotwo.si/free (raises the free allowance from 100 to 500 calls/day)",
              "isSecret": true,
              "name": "X-API-Key"
            }
          ],
          "type": "streamable-http",
          "url": "https://fourzerotwo.si/mcp"
        }
      ],
      "title": "fourzerotwo",
      "version": "1.2.1",
      "websiteUrl": "https://fourzerotwo.si"
    }
  },
  "source": "mcp_registry",
  "summary": "400+ data APIs for agents: UK companies, property, trade, tenders, recalls, sanctions. Free tier"
}

What the leaf hashes

{"body":"b18b3b45e5ec3c6a23e3ffab5a9769815158c25d1ff398b2bb0d5a50ebd6d9db","id":58955,"kind":"listing","method":"baseline/1","observed_us":1793025445588739,"prev":null,"subject":"mcp_registry:si.fourzerotwo/data","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. 0xc858298218523b6d8ce4e9ea641e71cb2f0444537052d1e5e80d34b4d13c8803
2. 0xde107bda297187db3de4ef8fb53a51b0b797589b14cf2b2ad0a84c5f8fbdccf1
3. 0x0d16ef1b1acb64a9f7fb8be3e69bf1b534149a9f7a7a78fed5c35e1840fb9cd6
4. 0x6a5203e20169d8145ab6a2f497cbd6dfcf251b665d1f26e6b513f4665f8f400d
5. 0xf51b63bf3da06bd07cc8a26ea186ccb6b5ad0cc9eba4dfb48b254ffb31560651
6. 0x1a9625cb8630f7ec24ddc283e9fb1aa5dc0f023d303b0bcb79d81263ab8d23ff
7. 0xeba2946eabced4323837d9a470c749ab55b2d836633636ccf429b7fee0f1e1e6
8. 0xa87d90b6fa4aff4daecc20111299a2ae849017aa7ef623bdadd6a102882f1041
9. 0x469a34c3c97adfe074d09a0783fee6072aec7957eb78f6ee3e2dfb639a2ffb62
10. 0x675ae978905879f96dab2ece83376d01eb27968f2044719307dbc7f840ae0cec
11. 0xac575d7ca8c3c7e88957908dda0517fbb35f0894886bb91a97cff3aa71fa23e9
12. 0xde09984239f27618a13932caf48f5d39831fc5021500b0581dce0dabd570bd6e
13. 0x72e35aac89ebca631656c2b1aecbdc094807d9807f12c22a6ddf35cc1f5e21d6
14. 0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae