Evidence row 3775292

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": "2026-11-06T20:26:00.859428Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T20:26:00.859428Z",
        "updatedAt": "2026-11-06T20:26:00.859428Z"
      }
    },
    "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": "1.23.2",
      "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":"cc16124e33bc9f343892ec4b86feb2afdb1e24c8ddf7114b4333544208b064d3","id":3775292,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794000217280653,"prev":3764973,"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. 0x669591d360ebb1c59ff9b293fe173e1c7ac4e207994d0dd850674738300a1750
2. 0x819cb306988773ede5862838b2157bf6324258f8d6b7ced060941c9b58a4fe77
3. 0x22d3231ce444b79227a93d670d46cdcbafbff125b24acfbf38c1f724cccd0a0f
4. 0xca943574309636175f20ee58b09d7c9cbb8ffa6c6eaf380acd0a44bdc59a8c9c
5. 0xfec0c57b806132f46a38adfc888939a3cb39de7fdcd48f86c6c0ed9c0be541f5
6. 0x4cc75253bad1d5a25777bebf7cc9965fd6b37c48cdd20a4f8ad9027b27401fe7
7. 0x17e956617fbfbde4fb78eda1c39d3cfe3ce79c06d8bc1f1bd7d47b30122a7b7f
8. 0x59bf9988eddd1287749bb17ed0180725bfe6ec3735196e1ff4255132da8e63c8
9. 0x4d9e36ea8f236f147bb8aef3c91bb3e593e9bcb1fab7063c99e1211f7f96bf8b
10. 0x5e651e517de305435eb4f598349308a4917057e93e76d6a16e2cf5ad222ce296
11. 0x74e6efcee1b69269f3ae0f489fcac0fa1bd7462f5fc75a00a1e2e22d090eb2ae
12. 0xf71b9a030e9acb0794414727573117c3007eae52d25b7875636eb296847ba5ef
13. 0x0a5e3333eb757b4c8818c07177ab0cfcb12c6f880dbe91765c3cafe1150c3e7a
14. 0xb127712f60d35ebf9394e769405258ca2f7a8338151d93fb5ef9288554fbff59
15. 0xf2bc30db87e2aa2afe08f16c1943f967ac74b2e32364ad0b7cb45d2ffee7e447
16. 0x7a2e5c8104eb5015bfa08d52a9278aa0b4da48bd2fb98690cc2d1c225b5dc691
17. 0x4a618d78b1cebba8beec4ef22aaac9187dcdfb39064e0be537ca2600abb90740
18. 0x119743aadcddb571b28b442b62196d4a0afc4e1c9979c2d477d34fcc9413deaf
19. 0xc0d08d48601d1be90bcfc025e66bcaa0030120d688dd9c919b36c2c4446f4948

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1