Evidence row 1541349

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": "2026-10-31T21:44:39.483864Z",
        "status": "active",
        "statusChangedAt": "2026-10-31T21:44:39.483864Z",
        "updatedAt": "2026-10-31T21:44:39.483864Z"
      }
    },
    "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": "1.20.0",
      "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":"99cb15aba33da2ba70aff3132fafa0e8c9d705f9a494984634af158bb2fcff77","id":1541349,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793485023196829,"prev":1537937,"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 2026-10-31 (246033 rows).

1. 0x4da35928c890de2f8f3ca6702f47e11aef16590735a298aa5282fcd9b7abd630
2. 0x1b1c7491a68e18810ce3eaa97a7f400f775151aa2275f9939ed0adfdaae57ca3
3. 0x2ce60b45ed9f3ccad58895d362ccbf252e81d3cd346a9f6a829c22f2df0f6c90
4. 0x0113a9ae688c310c3b5c576ab916d7cbbf1dbcc7e015a037bd7d119e40563f76
5. 0x13c7f94a5f357b9577eb983bc5e9d655c0b6a9de3af186426bee8b8cfe3a404b
6. 0x72c1b85312645a7088e47a16681fac72d2eee2f2cd6963a35bc0da3b537ae362
7. 0xcb2cabee391707f6f9cbddca761095703394dcc87e25fd5e6147fb49722f0c92
8. 0x2a1853d99d0c82441b7baf6cc2122d14016a94e21c2e632c18df11ac0d03678c
9. 0xa2a07235c428876e910a2910439ae3b1a42fae2365043b42dda375f8e0f16445
10. 0xb6745c66b93d566b80865e16a392f5df53ec907c71ba3e46a892a88a46c26d1d
11. 0xf49bb5c098c7379ad7d95db260fb8e602a114ea08d72adebebdc083d7cbbbbed
12. 0xd8082ac82a3597a5d01801914570acfd58eb4768c625e0c1bea0c5481620828a
13. 0x3b31ad2e230b4adddfd3db6e960243f893810b5bd12d29f0e9a17684e7acb3b6
14. 0xa61ca0b664c5ff2f545d3f92e3125f2b38c2b4e58fd9a71badfd8a85dda4c936
15. 0x37f0ccf90cd9ba8759ef0154382593820880794592760020f095a3628e43fc3f
16. 0xad4540f06e3fdfe46524d8592f8d854d4849e16217bc047eaf024f0abebe34b0
17. 0xa00a931d72706fa2402bfc9b441a12eb7c6a61ff42a542916106e3637177f101
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0