Evidence row 2726515

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": "2026-11-03T22:29:43.845057Z",
        "status": "active",
        "statusChangedAt": "2026-11-03T22:29:43.845057Z",
        "updatedAt": "2026-11-03T22:29:43.845057Z"
      }
    },
    "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": "1.22.1",
      "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":"b4c3729b9f7b9ecbc5602e123b923dd441e095d7ef98d019180064aa86163ae9","id":2726515,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793747993062770,"prev":2564661,"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. 0x4b94cd450497486a4a61eaa52d6eb961bfb9653703407cfcdcefb743dd2edf1c
2. 0xf9e877bdf2f437b174fe5e8f87771ce215e971dad746de8e5352b6b285c75530
3. 0xddde2a69596af90d57e6aa0450755f022dc9b9ca5d502912931183b5fa45b07c
4. 0xbd9d8bf30f23f454058eea32a954d2dfa20a7345b2620e775815f9cac6bb63a8
5. 0xbd657a79d25aeb2fce07832429ad9a16d431e1a0b9429a64dad4d72e7068bef6
6. 0xe9a36a011952ef62058fbe228d95a9ed43b9a03908bd242a6a545fb45adfd773
7. 0xfe903dc3625246efdc956945f4a30012564a1706b42bea85aba4a708242aff6e
8. 0x9d84f32d2734eef3f50d9fdf6200a28b56506ab692ae0bc563a77149de9f28a7
9. 0x9ffff864aae8a803234c7bbccc9f2941287d31b256b6ce8be68fed8e04fd7acb
10. 0x55df8122dd65e385ddb621e58334db5ed382209f7a04ef5f644b0d63f4aca7e5
11. 0xe639bce78b0a2f17f49660809213f3502901731ed5f9d2819153c797c78c8094
12. 0x906208dd0f61cb76c5ab46f992d0d280c98f599746784e36966fc3d12ec06bd8
13. 0x25e7c6e3ae958d725091b9780092a534731cdfe4819dd1ffe52af56311601eb8
14. 0x5e9968227987a7f0940fee03a33017f5e7157de7f0889921817733c1ab8871d1
15. 0xd106fbd3b5dac57c72dd4fc8931f69b38fd5a542627e63d015b63dadf2188a2f
16. 0x35ca4633a97853eefbf38aaf743dd7ff85a4c731ccc8e31a34fd826c3142d6ea
17. 0x87df2ed9052c264d606c076742aa7e54b69fc8344b21e972ebcb19d020b7ecf3
18. 0x012ad914f3f945da3b6b48eddc7a1388613e4afc04339deb76c609611864e9b9
19. 0xe35032d4b064b015fe60638756eeb0bc24e7c7943586468d33349341ee0ed3d6

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7