Evidence row 1537937

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": "2026-10-31T20:57:02.964006Z",
        "status": "active",
        "statusChangedAt": "2026-10-31T20:57:02.964006Z",
        "updatedAt": "2026-10-31T20:57:02.964006Z"
      }
    },
    "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": "1.19.0",
      "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":"09df972c30dca0faec19c7e0482cd00869028be893c000ac1d592eff0ec43b39","id":1537937,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793481418047894,"prev":1500238,"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. 0x06840509d0b1a0a8da86838a16c7cc170b69b633de47a5f4f4d7692714f0754b
2. 0x7969e89c706b0853c1972a5d24d5508548542f9fcdfb952cd25924b367a59de9
3. 0xd14a322324f38928687c9ee68c8e5ad19bb92ed86e1b154f10d8113853a6fbb5
4. 0x314df6cb49a952fc6878129bfaf03940925982e3db993572b223dc6f8664b936
5. 0x214638135a6002feee8b9bb5df15489bf56f8e8ed920659c8a8cf32972ccec07
6. 0x1e26d06546a3e6eac90f4db1095a09bf52acbbd9df6baff07f7a246670240ad3
7. 0x2291b074753e6e5086c0fd07ab9201d9ba5a4b392a407e1fe32b1f3b32a0d708
8. 0x0156cb356b1ce3c0965b0e488cee00c0d19de25ff61ae09c631a698968b8585b
9. 0x6f09ae9131f0e43da161ad4a1f2a6bb197b018295ecc1ff25c6fa72f9a0f8d44
10. 0xc28f7fa08f0e36727719ed7e3838cfab1414eefa4c00129b215de14bb9903f53
11. 0x6590ada4c645b20699eadafce515c247bb9e36c10111d6972a97a32e05ed541b
12. 0x1f70d8b03b3dfa5e37b653d675d329fd69dc7d07a418bee0f5f2eb4ae65437ea
13. 0xf710e54eacbe157b618c64e8dad060fdfb69ebcb70c1ca3bd9216c2857848588
14. 0x3c6faa3733ce39f85107d6cf00f3a7c42fd5fd374502ec6e62b0305586bf03de
15. 0x72fbe549c493739bb99e38209648de550f136f904e61b4f7609a937c2630a055
16. 0x2bca4aa3c59fe9209016c64bd8b706423477e3407201a00165afde9abf6fee2b
17. 0x37f13582abb3c002d51c2f190c312129cbc3a39754618fee2c75c2441bb1eb94
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0