Evidence row 1249665

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": "2026-10-30T12:20:56.91934Z",
        "status": "active",
        "statusChangedAt": "2026-10-30T12:20:56.91934Z",
        "updatedAt": "2026-10-30T12:20:56.91934Z"
      }
    },
    "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": "1.16.1",
      "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":"7eecdc8b6c0cefb541bdaeb10fe661a5416275c1c2c2c42faf7999cccc822853","id":1249665,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793366122565120,"prev":1025717,"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 2026-10-30 (243099 rows).

1. 0xbdf36198ce1a523266177678a61d9c43c4d029396a0300e8e8b715f3f1f7f814
2. 0x74e18afe8033b9804b9ee4cebe40e308483d947a9ecc1afbe2723009ec4a9f0e
3. 0x847d27820cb0b7ee9c48bfb255cc8b4f951104fcdd8efa33744c06cb5a80a7a5
4. 0x618930dae4dfb81d361174084638656a5453c8b6dece499185a7191d2988b348
5. 0x16ddc0f564068811fe22599f0884ef62040a233901c37e226689d3c7771932cd
6. 0x055986635dc1232af5bb32f3be30c7cd069c7695e15a936855d3359e2cb55628
7. 0x2ee0484e8aa17ee338c32c749dba7dcd1e32d6f12f330ba7f8dd2f53ffb83b5d
8. 0xcf0fccfec18b847aa5e272e7e14ccf507313f1f3b3fb1e8d4b6ff453dc456363
9. 0xf4b6628fa88998357993bd9b8065df2ab967217f7d1a967e27c0492b7ebf66cc
10. 0x98f60566c2957f248c2a7246e74140909035eabc76cf78dbfa6976f2ac6e6016
11. 0x3b4091080e80a608d97395e8ac8fef2ca9472ca42c9e71709d71e6837b50601a
12. 0x57fceab70f7ebf4cc21c64e8b15bd9836e9708ee682ca03cdf5f32afb6399a35
13. 0x0fe1386407f8ba162c04ac3fa7c25f73252796af4cb5a8f2d8f2ec65dc450f79
14. 0x342f35813d736e85ba1881bcb69ecc7b4b96d68e557b8417f1f4ec705ab16ab6
15. 0x9fb4eebd924fd42d4eb61d55691812de0db9242fc9c0dabb65c4054447246797
16. 0x0c59b8770d2782eb535aefbb9b2f6810bab4757f51b37e00f5147713a1de9481
17. 0x61ef83255d34604cb052882568ca1d1386ac3cfb8284509715bc1734cff77831
18. 0x0c43c73b62a5d49ee1444b5dc4195fc5b16b141d3f4458e2e9fbd5fd6ecb367d

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861