Evidence row 1257652

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": "2026-10-30T15:16:04.450374Z",
        "status": "active",
        "statusChangedAt": "2026-10-30T15:16:04.450374Z",
        "updatedAt": "2026-10-30T15:16:04.450374Z"
      }
    },
    "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": "1.16.2",
      "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":"04444957697bd9f3578fa9ba1fb6e8e7faf07a070f56599cde5bcbac4b40aba7","id":1257652,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793376929938028,"prev":1249665,"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 2026-10-30 (243099 rows).

1. 0xa8ef7478b091cb9ec142e926c38b2b2926c85bfd05114fee0447e37330b51c3f
2. 0x07d8a8899c95a98bbd5662a4e1b9376b5738bc03dad07e0c3e3a04ee367eaca2
3. 0x745c19dab2b1d6bec57f313ec159ccb37c5b781dea84d437d2d79a4c6b7a64af
4. 0x2feced078273cf1d868e7792e741865c2034daaa3a0ae4d6e70d6350e2fe1fdf
5. 0xa8e3cf69bedf58b59e3ba286d2d8426c4c8498189e1419e1f41bf93f08be259e
6. 0x00e77b935d4332e9bf6c83e7fe793451f6f60398527cdd55249869052b161e78
7. 0xde07181121045259469551be410465332b5c2c5e9e94a995b5b46f686ec51545
8. 0xe2710183f8073b925236cf2096be6891c6272dae86a70b234ecf400011310fbe
9. 0x6918e4d53c3eced1e3f91b88cb7fe7a948ae8e6811fcc7bea3ce483f379e68d3
10. 0x1035f4a6f33b2b4c2bcbb548927332ba3729d57418f724392fe50ec207a72b32
11. 0x4e9ded67b8392852c0e4ba3613efee184bf9a99c7b6c77694452f4e96249e805
12. 0x4ab8d68bbcaa7b8afc27bf2e2cc43484f79e17c23bef36ae5d83ad14d811db6c
13. 0x9889bd73e5603fc0045beeec785a4e7b83076b3dca643ee2497b1d068fa8e3fc
14. 0xe11a711cdcc033b4d3ff4f10f0568bda761703429a7ddfbf68a7fbd1d22911ff
15. 0x11b43ed362a2fd4976e11eceb94ee4b7edbaf6823474ee1c36489f8f0a0496c4
16. 0x835211170e79bdce1a823ec914e3532e128f77751e9074286da35091b0200284
17. 0x61ef83255d34604cb052882568ca1d1386ac3cfb8284509715bc1734cff77831
18. 0x0c43c73b62a5d49ee1444b5dc4195fc5b16b141d3f4458e2e9fbd5fd6ecb367d

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861