Evidence row 1005403

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://lessonspace.usefulapi.io/mcp"
    ],
    [
      "web",
      "https://usefulapi.io/lessonspace/"
    ]
  ],
  "name": "Lessonspace MCP by usefulapi",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-29T07:45:35.96422Z",
        "status": "active",
        "statusChangedAt": "2026-10-29T07:45:35.96422Z",
        "updatedAt": "2026-10-29T07:45:35.96422Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Read Lessonspace sessions, recordings, transcripts, spaces and users; launch spaces, edit sessions.",
      "icons": [
        {
          "mimeType": "image/svg+xml",
          "sizes": [
            "any"
          ],
          "src": "https://usefulapi.io/icon.svg"
        },
        {
          "mimeType": "image/png",
          "sizes": [
            "256x256"
          ],
          "src": "https://usefulapi.io/icon-256.png"
        },
        {
          "mimeType": "image/png",
          "sizes": [
            "512x512"
          ],
          "src": "https://usefulapi.io/icon-512.png"
        }
      ],
      "name": "io.usefulapi/lessonspace",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://lessonspace.usefulapi.io/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "servers/lessonspace",
        "url": "https://github.com/m190/usefulapi-mcp"
      },
      "title": "Lessonspace MCP by usefulapi",
      "version": "1.15.0",
      "websiteUrl": "https://usefulapi.io/lessonspace/"
    }
  },
  "source": "mcp_registry",
  "summary": "Read Lessonspace sessions, recordings, transcripts, spaces and users; launch spaces, edit sessions."
}

What the leaf hashes

{"body":"3582c2651b4493726fce39001b24a94240473206d1751eba41ada91520c3aef3","id":1005403,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793261579925994,"prev":800807,"subject":"mcp_registry:io.usefulapi/lessonspace","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0xa350e1c364d45f115768b2ccaa2024e78ff6a049fba98195686119c190456b17
2. 0x10704e4ed794f2d4e2be5c339dd7d6d2609adc67a3e77494cdb2115228c41dbf
3. 0xf0e31358129eb0304e8be61e25bc682ccbe62fb4932666015571849c09780009
4. 0xaba79f92548ba7b6c55ebb4eb8002de78bffd1194ba42f11c4fd4d5bcc86b087
5. 0x6fa0a0ac79f1fdd04fb2e4cd45830f0c0df6abd03b1eeb75abd3b7327cd27947
6. 0x808517360c59867c2ae5faf945da228e6a89b1d29d8a56b0f8678fd5d2d23237
7. 0x3280e9694b372bbf7d57585c55c9504edd7d5fa0b08199cd4934a9558f9edb73
8. 0x9d04f77e5a3faf5526d847f0ea900e02e19b32c33c9d4f7d579e421881621b2c
9. 0x001f317c7ca009d518dae11aa1b2480a4bd221413558f83cdb081a88609a0a2c
10. 0x9d6015626a99c6e3ba7ebf1d3f1326cefc031302b8c1ffaf41f60b4b57b1521f
11. 0x0292275082393d2b3f835535f01838abe3f278e0c466da0630a278667752d710
12. 0xf196cc00b7672b10b3a40c5db4052812536b5c6d43c46a3ddd694d991d90a434
13. 0xca17a2e94b7421694732046a20cabe42947d7e7fe6cf159360aae143d4c787ab
14. 0x96603408ef495fb0a8106bb839ad20e6578c0c0fbded2a9b235438f5985b0f0b
15. 0x4a1f9fe26bf92c291485b5fb33b95d1917a994e417ac0526ccef55ede0a90a4c
16. 0xe38dc587bc010668982bd78025ac33d7326ffc2587f2de00e848da2718907ecf
17. 0xa1fa2e97e71ad6e802f325afd74bb7095901f2060529c9739182a1233f8804bc
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1