Evidence row 795786

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": "2026-10-28T18:46:14.803033Z",
        "status": "active",
        "statusChangedAt": "2026-10-28T18:46:14.803033Z",
        "updatedAt": "2026-10-28T18:46:14.803033Z"
      }
    },
    "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": "1.13.0",
      "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":"3f9efde037694d4bfecc7d25ccaa362012919841a45bf55f18425ee947dc2952","id":795786,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793214747302718,"prev":443178,"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 2026-10-28 (231336 rows).

1. 0xd3b91e4d9b9122abca4a67f9c68f433debfa054c855c148e1bd4594934072d55
2. 0x19ac1705d6e9db26abba4769538c9cbbfe5182b9947715f1a69f57282e7fd333
3. 0xaf220955c76b98fbb94323d7c90d7935dbde36b4aacc3125e5dd6f197212aa85
4. 0xc1f02bd6d5df95fefdafbc0482cf6f8519bc2e5df3038acbca84dd4f70456806
5. 0xd29455bbdcd870c554cbda5f6cf8fdc1899b255d70d1bedf207653d135fcd58c
6. 0x05ca2be3cb1b503a24e7d0e9bce27a9ed4b7b3761c06b3a2a2768878910ee5e9
7. 0x60f3553ac6c099648a47c85a67805153d63e9331d464c9eeb861b267f31fca2f
8. 0xad6a01c199d2ac52b577fa1cd2681a59a1224aecc7e8f362c4915f7df86d6319
9. 0x66e38f423b1cb68d106e164f407da977e88e1d762bbdaca271ea1c039ba606d0
10. 0x4647a5979609327142795f04568e1a3c87a58e4cd1644b435701808e875ffadf
11. 0x6cd2d3cf3d8ea1f43dd9ef2de56ac3bcd83b1045cdb800815518b442d3a93878
12. 0x4e65090854d09774c6e68e986d97629dbe6b8a5818463a0edbf12b4e1940476f
13. 0x238781565933a6272b970b298fead630d1a9f307a7409c815f764c79bd0179de
14. 0xf6b8c3d6b5a76cd63c41fa19fc59bcc627a6c650fd84130c55cbc9251f9ffdd9
15. 0x6d86d2282dd724b1b80d031e4e3cf9ed095b746e38c9e58d933efb597daff87f
16. 0x32beeeb960280bc48748681cb10297ede9403461fe9c8143fdf946548e552926
17. 0xe08e8bd91858a8a10c46ecde9c29a6288b960987303173c5e882afb46ce91fa0
18. 0xe6cfe00ae4e02bc12327e45b5f3334ea5850ba3bcc8e3101d30a8189856a95af

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae