Evidence row 3723614

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": "2026-11-06T12:08:55.213539Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T12:08:55.213539Z",
        "updatedAt": "2026-11-06T12:08:55.213539Z"
      }
    },
    "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": "1.22.4",
      "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":"9eb7b3c84a20572ae991c03f89db62a6267ceed5fd886595e0d00b2dd60d9c96","id":3723614,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793967739946644,"prev":3414331,"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. 0x1f0e276cfc20dbd41cf5ab03fed429ed19151e049eab9d46fe30a5f90e1cfcd5
2. 0xe6de51a6abf28c179448c97cc3b6be88973bdba859cf7e3f9d6fdab94a2cf7ea
3. 0x42a5ae308b5921ef7b618c3f2ffa2d82f5ef619e5675aa26f1e959cdb135fb6f
4. 0x21136171b9e09726ef4b6452fd5bfe99a0b414f7d62e68726f40a4aaf1132b0d
5. 0x1d34a5443441c13e433c26b51a46d5c4b8b30cf269a60d4e5fb7dcd09af48260
6. 0xf45ff140152832585062b041730ac2f10e52cf45c5b9f933016ea44693ddd743
7. 0x54b7a8183bd15148b1c733b2e04ccbb6b5b805cc736c10f6d1cd6d0dcba7e6a4
8. 0x88a212d11f4cc2d2f4e20542d2354d9668f6b3f6b53ea0893617063998e87e35
9. 0x31de01d4e8bb5cc060c44db25d19ea71237347b0f5b1ad203f64675a86e39fec
10. 0x4a40df9e664b73ef9df1697fff355cea9d51b4eec8cde6fec300d36e4bc67f64
11. 0x128b9ac471633bb0e65328533b267395bde1d0a29f577e5258d77addc1da79d9
12. 0x7583d8c1ba1fe74d9320288c7431b3aff692946945e2e792bd2891ef6e0cea9f
13. 0xad6313ea8c1aaa1c3253abd3203b070e253b49b4d718f335b5b05b375854db89
14. 0x81d6ec63cb4df174d42a42d72162141e82dcafa9c256793b20cc12205d8d389c
15. 0xb490b9bc961e5cbbfaf890e393a2eb3d2518e080e0a107acd232486f34cf7408
16. 0x0aaf291a2ffa2205e7df7531bf36800e377dfbd67208da05b97625f1cc49ce02
17. 0xa448dc698494f795f2240c0e7070e8a93eb263baee21ca4185a7d03432a614d8
18. 0x119743aadcddb571b28b442b62196d4a0afc4e1c9979c2d477d34fcc9413deaf
19. 0xc0d08d48601d1be90bcfc025e66bcaa0030120d688dd9c919b36c2c4446f4948

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1