Evidence row 3396080

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": "2026-11-05T11:41:32.29206Z",
        "status": "active",
        "statusChangedAt": "2026-11-05T11:41:32.29206Z",
        "updatedAt": "2026-11-05T11:41:32.29206Z"
      }
    },
    "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": "1.22.2",
      "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":"219f7d3c31026d32782467f8dec8c9636e954e0fbb7b77a5252227b7102d6d9b","id":3396080,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793881289215808,"prev":2726515,"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 2026-11-05 (322504 rows).

1. 0xce875cb131590be8cb0507102de79b2d1107b663941c162421d27fdbfed8e10d
2. 0x2530a3e335bc629a7eeacd9f58219edcf3658fa696f8e6686e727bc65df8559c
3. 0x735f636cc30760a2794ce3c55b3fa10c0266c3d6dcbdd0ba0fa82cce333676dd
4. 0x0fd8c5d578642f02e062b14606b5abd88aee4e0e4065776373dbc50b0ce48360
5. 0x9430046eb01a80a09385be97947747cd94cf67c8ee0e73aac30b51c8b5de8ff3
6. 0xae314ac5567c35a4c6643a6044a7efe8e636481cb3945b9dc8318a12ec960bc8
7. 0x24c33e7775fe8e2908d0f0b1a9d8669436e7ca20da08797fe9f6fd2cb58e1263
8. 0x6e9206e47cf9aba3911eb02e5de9e31c84ae2bc51f8256603d4989b3105bdd78
9. 0x4edbfc0725d320b5f42b24e64f9dbae0dbd47103a5ba276366c89b440b851a02
10. 0x325464b95ee1150923c92b5ed5c4661f458b9a84982ec9456f32e9ec87a9ef8f
11. 0x5a1fd984bd91742138be7b2a559c49e149f796dbf4844612c8070de5eb3fc57d
12. 0x2f54a7fed46f67f0bd0c8813f879be9e525e6a83d50774eed3a98e1c600c20b1
13. 0x529d72b10b0248eedd802f0f2ff731160d9b376d794fe8f8c3100bc8ad70426a
14. 0xd01459647d40d605c761723e6522a6a8a4f8cfb9e4f0ef03c29b44591ee9d962
15. 0xa4e56d82ec36b49551d49bd66018a63f06e5a1bf1f57267e4e574643bc111b3a
16. 0x308711d37f87ac2fb79802c45aba249411861d2d093068d1718f039b506d2a02
17. 0x25f3843b1f8d3ded906cf440101c0137d8f897b0b72f946f0d5bc12c3da6b136
18. 0xfb4e1f4d701ae273fb0cd57757f659e327608e5561a752b2099b436618493c84
19. 0xf72fe7c4860b9addb17aac4a00b8afc2f8085836173f10f31697c3d192df119b

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94