Evidence row 443178

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": "2026-10-27T08:35:03.758419Z",
        "status": "active",
        "statusChangedAt": "2026-10-27T08:35:03.758419Z",
        "updatedAt": "2026-10-27T08:35:03.758419Z"
      }
    },
    "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": "1.12.0",
      "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":"355989210c52931c1c13e5deff0212f62438bbb976fe7bc974da5bea1e3b2fc7","id":443178,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793093258449504,"prev":56686,"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 2026-10-27 (273461 rows).

1. 0xcf0d5331e60cd37f1917ff58a6186d380c1838a76954aae53d40341be5252805
2. 0xcbbbf64172ef79a2e802692c2c7da37f8f467b419c473279cfdca032a33b3295
3. 0xecb9f779b40ecb578e58c056f229dd1145b37501f2b85a722541c2e54bad5d20
4. 0xc1846e10984a70710029b5f88336c65c57b810e6f5436b058728dcd419b0e97c
5. 0x138737af9baa4d59bdca3dca2d28ad07008c60bdb1634da89b664edfe5dad604
6. 0xf3e0fa0a68ddbac6afeb8697168707dd5e61bcf66ddaed5e0d9f5d5e1f3541fc
7. 0x01c9d41ec6ee54ca10c1bb32e4e31033616fd36b2ede1d4c252a9dcad0837b42
8. 0x0338334f728feab0deaddef414c3a4d11dcf7e152d331308ec1ba346c76b6238
9. 0x68371e7def86d7ea05cb91a2d0af882d0361b6b47686d215731cf9c66ede8fe6
10. 0x30ad798760992f971585707745468508c3c4c2162f5055f071838282d683b944
11. 0x1b795fb9abcd1a676d4c0ff9d91ca003c12e195f5c97f0608cf1bba69a05bb30
12. 0x66e8d9e469038ef11a686abeed12c8ceb38a1a8cd79012ccf20d29a30858cbbc
13. 0xeb77e9d1884bf470f4a13a5869956a83ac37957112a29ccb9e63ddf7791b5a0b
14. 0xcc49fd573532e5a29f5be4033f62a2eff71456c020bd2258312b98e95cfe301e
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4