Evidence row 800807

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": "2026-10-28T20:04:58.60453Z",
        "status": "active",
        "statusChangedAt": "2026-10-28T20:04:58.60453Z",
        "updatedAt": "2026-10-28T20:04:58.60453Z"
      }
    },
    "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": "1.14.0",
      "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":"0c351d2f4c93a65289f1f831ff8aab926678783fd39dd41591cfa7e434651dfd","id":800807,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793218352136346,"prev":795786,"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. 0x089328a24e736292733b8b09bd505d40218568f1dbc2a223d2eb7ee64c2003e8
2. 0x3e53d5bc28ec760b177c7a4f2ed17f81783f14968a687ca2c4c1984ec02fece1
3. 0xd239cebd0c3eb0315887d4873bec3857170d291182542b9bdf1a9c9b1e5ccb8c
4. 0x6ec1829f8db759bdf5124c4f3cb5f4c23c5f97b551c60c34e6844f129bbccd8d
5. 0x885e1fe5b42440740bd64e638907ab5c0b7c02d1b761a461f6b787b307383e4b
6. 0xdec40562ba1f66d580cc44fe35cb48aca0d36c35f7f14b1b84f9955d37690114
7. 0x3345c085bbd42e70f8f9057dd4c0042e94e2f5f30a9dcbcf73637fa74531fd68
8. 0xb2827919ac00d2e696396f6f6e873c2be802157e4a3ab93f090d54bbc24516cc
9. 0xf2fa48e5ff29cdbda8a8d99333fa4e4e06560fb9d9c324798fe64bcdc4002582
10. 0x7d315b556bed7c695f760cedd44f9cc2e78a7a7b1bf628ac19dc2820172f44c5
11. 0x5584abd14badcd73025dcce4c64aa405404c405ff91f39a427bda991a1e95b37
12. 0x825b5cba69887117963e0cfd615aa74fe5ae01aa1deb0098d6b7e04e01634ba7
13. 0x8dcd5f3419d7730712ce62dbc974d197b0e9c47ee96e0172cdc134c7a6bf73f2
14. 0xf3fd571846115a5778f2f20ec53a7e9b272de5f8737a627379966b3745ad5e29
15. 0x2d4bed6c1c0f427d29eba935cdedcc76c72935d41919903a3b217a8ffca38438
16. 0x35e8995c30094446ec790423171382fccb377081b921295b0ae3840cc2c4f52c
17. 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae