Evidence row 2546556

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": "2026-11-03T07:15:42.811526Z",
        "status": "active",
        "statusChangedAt": "2026-11-03T07:15:42.811526Z",
        "updatedAt": "2026-11-03T07:15:42.811526Z"
      }
    },
    "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": "1.21.1",
      "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":"ec6aecb0f3164527cc2e9a821c28a139a9663e2a42aa5685364c6502e3f04896","id":2546556,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793690348553986,"prev":2130324,"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 2026-11-03 (425475 rows).

1. 0xed9fbf8387bd2695b8eb05d9a13c3143fbd56b73b6f152729fd8b01acfd3b92f
2. 0x6347f1faecc186e47bb02774a10164e317d6b965584683a0c9d634cca22b3804
3. 0x09f528c4df7acc6f51cc17024afd61e62da7363466d01b7fb83fd1b74a8996e6
4. 0xd39cc6f98ee073d640d77449b4f79f494f0d248422708d257d9d5fca69ad9863
5. 0x124fda279971c28b06d27fdafb98bc9d84d2602a2816cc445a799af67e399003
6. 0x553a18d577d0e80a754c6ab7cb8eec46f9e2ebdccf543eaba4070d3ad07637c4
7. 0xc86d1dc8398824d9c0806755aad024082c00303954c5beb60aa5d540ebe366bc
8. 0xb4c0d4b28dc0db62d44c6bd341b304056af3b3c9c378d856e4a3c4a52f9f3d97
9. 0x2d0dbef9da7d5d118a40ebeca3b4ef0b3a8039e7201aae02a7b56b9dd9412c45
10. 0xb4caa66fcfbca821591e3aee12325ce76e2da9306fb0dcb2af724a299d9d9178
11. 0xf5729321b754cc39f318972201dab05c3750e2a2180b2bdd5864bef23ac2e2da
12. 0x3e14a54c6a439865af5ed15784a9e7980e57d2191e4f764053c87eab828b7071
13. 0x01e9de68aa9b43892927b1c264f77e0ac05047278992dbb0b29801b5ee9c6fd2
14. 0x2548979bbd7b1568b5a14db6fca0201979c48165192f2b55f45fa21471031e4f
15. 0xa29933ab8020ad948edbcf3e65194e73a6b113a0063231c1105b56c2d59ab97d
16. 0xd60b16e6a71fbffc93a233ee89f916e50c0206a56f52c852b85e5a246b6b417c
17. 0x85f3a27c16056a361d9ba33355a575ca7123f86de901b204c88953c4b8ea441a

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7