{
  "description": "Complete signed metadata document (PROTOCOL.md Appendix C.3)",
  "channel_id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
  "signed_document": {
    "v": 1,
    "seq": 1742000000,
    "id": "TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3",
    "name": "Test Channel",
    "description": "A test channel for protocol verification",
    "stream": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/stream.m3u8",
    "guide": "/tltv/v1/channels/TVMkVHiXF9W1NgM9KLgs7tcBMvC1YtF4Daj4yfTrJercs3/guide.json",
    "access": "public",
    "updated": "2026-03-14T12:00:00Z",
    "signature": "2TgRpS4h1UREKn3rRGk3cMRQ9fXQZ2TYX76oWCkHnDbHmUm2hTNAcXy8nSphcFVwareooGM2hqwvWgoGigaCNaob"
  },
  "verification_steps": [
    "Remove the 'signature' field from the document",
    "Canonicalize to JSON (keys sorted, no whitespace)",
    "Decode channel ID from 'id' field to extract 32-byte Ed25519 public key",
    "Decode signature from base58 to 64 bytes",
    "Verify Ed25519 signature against canonical JSON bytes using the public key"
  ]
}