Evidence row 3958119

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": "2026-11-07T18:03:59.084398Z",
        "status": "active",
        "statusChangedAt": "2026-11-07T18:03:59.084398Z",
        "updatedAt": "2026-11-07T18:03:59.084398Z"
      }
    },
    "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": "1.23.4",
      "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":"c5ebd8d427f6b1d6a3ff1797b2dd8d1c9ac3777119996e67475a97619c7e459d","id":3958119,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794075899396181,"prev":3945270,"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 2026-11-07 (195826 rows).

1. 0xe73f74f51314adfcd686e2cabe149709554579019ba658ab1e85a7a2fb214e27
2. 0x703585d95507a572d4b56ff6a1c9e780991f6f7874416562ea10be195226a73c
3. 0x82f8e00930be595350170d2a4e253f745535e8ab72258d4c687432b4e9a7a97f
4. 0xc1483ed0a82b1df4f00941b4bf294e8a800187eaa2eb66f8eeb069aba3c98e81
5. 0x81fc284d2acca8cb109576ba94e5cdd484e3d4ef60101783f81a23387f558a21
6. 0x734f7ec598d75687df67c76ee5d223d62f43dafb8e74a99efcde0da39b8cbcb9
7. 0xdbb9cee612b3171169566205a89dc0e9150a98ae9877b86817b782a50e6334c2
8. 0xccb78c76c87e352afcf804b181293aba79c0220fab0a2a87a6a3d6720d681ec8
9. 0xa1d14b3f49cc14dcc95ae98db0caa8b2a2012b303add28b3bdb213a01ff9910c
10. 0x600afec95773b09ef7bcea8fb15518e29083b2f93b3bbf7fb6a2e211ea86482f
11. 0x0cba5d57e844571761c9ee50507461e9d922e5143f5a7a7e10960f8cb2513c3d
12. 0xab9284275fd67eda31ddd6d2ea701f8c59fec93fd58a3bf8cb5ac7a3c7c3cae9
13. 0xe79f2ce46cab03ac264319838ae3b783a627edc1ba5fa188c7c509f21c4e4085
14. 0x6f49c61b0121647381a6cf39821f3b65b9e708380eb6ac63924f415c4db07607
15. 0xe840e410ee5ca60b9428cf31ac97ed84879fffbdab20af854208e002351d4fae
16. 0xbb3be27e5da5ccad91ce4674c6eac53275c0832f3885b89533d2be65d38f2fc6
17. 0x9ea7c2ecc6985da4b761b0f9096b7858b3ac8e3e47717c3840537fb2ff31c6df

Day root

0x17da9e85e1b138541355d33543ff34e3503cd3a49d37728fb53643e2a0416a2d

Chained

0xed34bd4af17282643de8cb9591c84d0aa1b39e1e9ae9864941e543f5a15718cb

Published

On Arc Testnet, block 71280839: 0xc3f6784179e0ca32236ba89472473e882a81d03fcc5ce27ca58ded2e01e112aa