Evidence row 1025717

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": "2026-10-29T12:34:24.571006Z",
        "status": "active",
        "statusChangedAt": "2026-10-29T12:34:24.571006Z",
        "updatedAt": "2026-10-29T12:34:24.571006Z"
      }
    },
    "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": "1.16.0",
      "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":"502a9bb6a36c49d4f0833d9bb4da87f60516ed7644f6f35340f2983c45e485a1","id":1025717,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793279590187838,"prev":1005403,"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 2026-10-29 (242798 rows).

1. 0x2a2eda35f7f38e04efc4aed2e8839070698e5a740bfa67c72a1b82b578bffd44
2. 0x59c40a0977db29e7f3319d3b570839e63b5e707ce85b84a6aefd3cc9d77e9844
3. 0x8d236e2aa3b9a58be1cb93468b8500fe438a44f984fb51f44b2a165b8a09d034
4. 0x710615488ef3c9cae40b8f937b5c82a3fcce41f08568e0c441f0b527fd10e281
5. 0x8b16c29c12fe3a292a61c3a37b8eb7561a65d8d73d581e0c83319263db539d7d
6. 0xdc378e19e354220833bc8bab8fc991fda72a5ffaa27b967344640bd18314bd43
7. 0x278bae993862fd29ed5e9e81b62fb6fc46cf3c309d7c8a4511e552087ada3def
8. 0x4d6c50f2c532f075cb6b8aa2b6faaa2aa5192c1ca7684341f4ca7f95af7ee79d
9. 0xf36d62e44cda334aefcce91f3f8ec2dc8bd3dd03ef413ca13679380e3de92f7c
10. 0x505d549cb586b8165fb03df203e2179a7e8a504fcfddde35dac25b1920ac61f4
11. 0x2f436b2bc71c2aff21674202b9da34c22c2f7b2b3be6faf6166f357108042f43
12. 0x9474099dc157fa43a371c61fcb09f1d6db2ad87acc3f468d498349cf1764ec32
13. 0x0578ac51015c13b031ebae2ad1327fb530b3c3e756fcd27ad5aec34155ce2a69
14. 0xe5630d765942d2009587828da7f2d173776eecb52114ac282f05c7b772bfe337
15. 0x00268e62f7d5ca6313e0e60afdc2bd4f52c6dbdb3b4b4d27e01e634b4bcb1d2c
16. 0x1c3764b490d23b94e5ac838c89f8d3850dedb0819196f367da2479c7a88bf2c0
17. 0xd76435ead496863d8b0bfab3434f54cd11da3c49d104fc4064b9cb3381567bbd
18. 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1