Evidence row 3945270

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": "2026-11-07T09:17:21.629904Z",
        "status": "active",
        "statusChangedAt": "2026-11-07T09:17:21.629904Z",
        "updatedAt": "2026-11-07T09:17:21.629904Z"
      }
    },
    "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": "1.23.3",
      "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":"288401190761d1af60f5c784618bdbe59bac5778beda4b54362078a5bf69183e","id":3945270,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794043456709625,"prev":3775292,"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. 0x86afa21784668730dfe73e6867fd4262f69d3cd1050858422055e90564bd7970
2. 0x6456bca461832619f467030109399fd0b2e46723cf0bdee4079e3ec5228e62a1
3. 0xb446f11f97babc735401cc247a52ba779831a43bcca8c93be2a49561a923df2d
4. 0x75bb86ef72aa65aab984c70ef30cd358faed19c294269b1c1d28f69e4c7079e4
5. 0x4aef545d9729f8a0c03e596229668123f2ef49e86f4f1a689ee0cfa44246e8c6
6. 0x46165005c55e1222c101f229624d5612eab852dc77d9c4273b0ecbe67c22a0c1
7. 0x12ad0162dfb6a1c45ebd28fc1ecc80b38a34b1f229e62d650feed144e38207a0
8. 0x998620cb346db401aecd3b24d4e55e3c4b8f381ab628cd7c802920b04e136539
9. 0x07febf3fc3dd7207d6698a9bf6e7e6219436248397e94b69f1412d21f4158ca5
10. 0xc9ef9d6f7f64e6e9a2dea5b2379c14ae8d305b308467d7c26d382b7f10c65a1f
11. 0x035d92712e6e35daf8f49148a63b7e6a5f10b98a9449f7c2a167414df6bb9798
12. 0x7daa9313d40a8ed4ceb306be2ec84dc47fc90b137aee0618b5a333a9bd0f6e1c
13. 0xec49601319806ac4fb8864fe5b58c4d0e2904402b01d96fee8f1e2e36118c30f
14. 0x12c0a392774b845f910669768178b834bb75c37650d35b673c7a7e05ebd31c5b
15. 0xd41994358bb34b15f062df47abfbb736ac4887eb6ef21ce32a5d581e6ae47e6e
16. 0x39ddab61a3a1eeffcb2f54acf6ff87eaec375674f3e77f00c342826d4e1bf071
17. 0x3b69f6d98c91b21287021db092e52491474f0d08438393ac130d6a3c273bcd4a
18. 0xff23fa8a9de3f957315ef0dfe7e8d8f6b1a51dae05fef7615c59794e019ff05c

Day root

0x17da9e85e1b138541355d33543ff34e3503cd3a49d37728fb53643e2a0416a2d

Chained

0xed34bd4af17282643de8cb9591c84d0aa1b39e1e9ae9864941e543f5a15718cb

Published

On Arc Testnet, block 71280839: 0xc3f6784179e0ca32236ba89472473e882a81d03fcc5ce27ca58ded2e01e112aa