1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7276aa265bc0640070abca0cece23d324fcb9857b5af541f045512ea44f1221e. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f5fa650-6d18-4fe9-8403-7b0191ee101a.json and https://artists.proofprofile.net/proofs/artist/0f5fa650-6d18-4fe9-8403-7b0191ee101a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
7 Minute Vocal Warm Up Low Voice (Mezzo-Sop, Alto & Baritone)
7 Minute Vocal Warm Up High Voice (Soprano & Tenor)
Full Vocal Workout Alto & Bass (Low Voice)
Full Vocal Workout Mezzo Soprano & Baritone (Medium Voice)
Full Vocal Workout Soprano & Tenor (High Voice)