Evidence row 3764973

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": "2026-11-06T19:35:11.535546Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T19:35:11.535546Z",
        "updatedAt": "2026-11-06T19:35:11.535546Z"
      }
    },
    "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": "1.23.1",
      "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":"0918a9fcae1ce45a063d1c5f7993ffc03a0adfcb4dac07f87afb31c6a787edbb","id":3764973,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793996592735770,"prev":3723614,"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 2026-11-06 (303443 rows).

1. 0x2bbb9eaf9339da86cbe1fff85524b61811dd8a57e74273e499e2a98fc9ec8149
2. 0x115c263b86bd353dbbd968247ad9081b08e809f9102281e76ec484d994c74e57
3. 0x1ba6089f8f658a8d2258b4a0ace3c391230b6c95299a79497af47d6cc22bb3f1
4. 0x73a527c5509bc9f8ee1100f6cc0af0571f2ace8f9b7b6167d969a6793a5a2c54
5. 0xe029d85ac8c3ff6fcd3a4f7631b7bd1fe3e55502e4f98385f08dc6e3f4d34d7e
6. 0x9a0421017e242e3d0e457e749d2c6b74a094f0a18f4ba5929733dc4c3acbd8a9
7. 0xd478116b9d408d1edda8864f61f46ca56f91e8ce54d7686456faa20e6017beae
8. 0x344e65e632e32eda889127dcfe2c17ccd1ab4da717b992e921f70aa5d6cfee58
9. 0xf75767328557169b46fd51ad11630d01e3694b54f407236915c1380a4e397b24
10. 0xda76c29afe99bae91a40af99cf240b2df3c96a98be11429de5c1072d9be83810
11. 0xbfcdc074918c5c66f2a43fef2603e6f0385f0558af336d758ca555cbc44681d6
12. 0x855b4272c2d2a2292420278c9bb17f9567eeb72186854b1c156f0e93cb32d97d
13. 0x306349fdc1b0a753057a19c566eb065b2f22532faad4d336b92f0b17b12423da
14. 0xb3969cc604693571253fb2f2b926c79b3a34bd130194a76a108232bb221e1e74
15. 0xaa85d31529f47e1b810e9dfd8bfa6050b99090fde56ac1fa1fb399ad1e6bb919
16. 0x0aaf291a2ffa2205e7df7531bf36800e377dfbd67208da05b97625f1cc49ce02
17. 0xa448dc698494f795f2240c0e7070e8a93eb263baee21ca4185a7d03432a614d8
18. 0x119743aadcddb571b28b442b62196d4a0afc4e1c9979c2d477d34fcc9413deaf
19. 0xc0d08d48601d1be90bcfc025e66bcaa0030120d688dd9c919b36c2c4446f4948

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1