Evidence row 3987276

What was observed

{
  "endpoints": [
    [
      "web",
      "https://usefulapi.io/youtube-data/"
    ],
    [
      "mcp",
      "https://youtube-data.usefulapi.io/mcp"
    ]
  ],
  "name": "YouTube Data MCP by usefulapi",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-11-07T21:56:39.612632Z",
        "status": "active",
        "statusChangedAt": "2026-11-07T21:56:39.612632Z",
        "updatedAt": "2026-11-07T21:56:39.612632Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Search videos; read channels, playlists, comments and popular videos in YouTube.",
      "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/youtube-data",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://youtube-data.usefulapi.io/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "servers/youtube-data",
        "url": "https://github.com/m190/usefulapi-mcp"
      },
      "title": "YouTube Data MCP by usefulapi",
      "version": "1.3.5",
      "websiteUrl": "https://usefulapi.io/youtube-data/"
    }
  },
  "source": "mcp_registry",
  "summary": "Search videos; read channels, playlists, comments and popular videos in YouTube."
}

What the leaf hashes

{"body":"12e6aa2d2c3d905cd2d856ef5fb892e1c12ee68a087bdb5f594574be46e3033e","id":3987276,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794090328995509,"prev":3958492,"subject":"mcp_registry:io.usefulapi/youtube-data","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-07 (195826 rows).

1. 0x9a3a311ccabead3677d9638049233e6ebba1d12470c80a00aca9a8cebf441225
2. 0xeca60eea3e24bb13bb63432e5885ed3576eaf6a153f7e36a82ca43c0836b1889
3. 0x703da3b124be3fcbb96e96179c5902658c0d6caabc2a72f171b53700ea82c0db
4. 0x996509962af908c93d1c6f136351d49d19854808583ad249bdbd6171b7277804
5. 0x0f5d57ba4d6884ea7047d98ddd917aff0b0ddd75e073689e7636008518c3776d
6. 0x8690459de75577c26b80551d9eb8aab11a8c38fde676408d09d21daa7d61ac47
7. 0xc0b1cbea6c088db0930a280f706036a65db1799c74d34f57473a43958faa409e
8. 0x4bf4aac4339e4fc28c30f82041bee8099b3eee7d23e7848fda31eee8232a234b
9. 0x0578af456fe99979b9f87956073f481853808d1641418417fd0599ac011320bc
10. 0x1da125f1426eb4d87413b57d038824bbda52cc304527485c18880955f2ca0679
11. 0x9ddc02aa1c828db462b13cc6f7fe35dc36655824a7d4c6d1e110c63d85bc4ed5
12. 0xd4946043dd8e8e77ba728f8a5c5bdabf1689330c240241ee5ea4db538ec69148
13. 0x896a302ddb6c3e628fd10f4276effd7379c7f710d1b433719e79adbeaa864e88
14. 0x29f53556c590185a8a72635fbd8aef678cf0c411497b5985f3632d619ce0bb36
15. 0xd43f13f6774b4e9adf7a95c9811fb4fe9b9256ca73bc6f20577cb4cb147ba0eb
16. 0x39ddab61a3a1eeffcb2f54acf6ff87eaec375674f3e77f00c342826d4e1bf071
17. 0x3b69f6d98c91b21287021db092e52491474f0d08438393ac130d6a3c273bcd4a
18. 0xff23fa8a9de3f957315ef0dfe7e8d8f6b1a51dae05fef7615c59794e019ff05c

Day root

0x17da9e85e1b138541355d33543ff34e3503cd3a49d37728fb53643e2a0416a2d

Chained

0xed34bd4af17282643de8cb9591c84d0aa1b39e1e9ae9864941e543f5a15718cb

Published

On Arc Testnet, block 71280839: 0xc3f6784179e0ca32236ba89472473e882a81d03fcc5ce27ca58ded2e01e112aa