1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9e831040d39c386fb8af0a5f223209c5fb1bd51654429485b37195ebb5d13c. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69c9ddbf-409a-4da9-8db0-a166042e2711.json and https://artists.proofprofile.net/proofs/artist/69c9ddbf-409a-4da9-8db0-a166042e2711.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Exercise 07 (Ascending and Descending Octaves)
Exercise 13 (Developing Your Chest Voice)
Exercise 14 (Perfect 5th Starting On the 3rd)
Exercise 15 (Perfect 5th Connecting Notes)
Exercise 16 (Stretching Your Voice Over the Interval of a 10th)
Exercise 17 (Developing Your Head Voice)
Exercise 18 (Stretching Your Voice Over One Octave)
Exercise 20 (Stretching the Voice in Its Fullness)
Exercise 23 (Stretching Over Vowel Sound Over Interval of a 10th)