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 0xb5c0900c60771112e2aa92ca6882c5b3876ea7fff99290e815eb00b722bc372b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/310fb835-46ec-4998-80dd-fa59d4854bd3.json and https://artists.proofprofile.net/proofs/artist/310fb835-46ec-4998-80dd-fa59d4854bd3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carl Czerny, The School of Velocity, Op. 299 Book 1 (At tempo and half speed versions for practising)
Carl Czerny, Practical Exercises for Beginners, Op. 599, Volume 1 (First exercises for the knowledge of the notes) [Remastered]
Czerny Op. 599 Exercise No. 1 - Remastered
Czerny Op. 599 Exercise No. 1 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 2 - Remastered
Czerny Op. 599 Exercise No. 2 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 3 - Remastered
Czerny Op. 599 Exercise No. 3 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 4 - Remastered
Czerny Op. 599 Exercise No. 4 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 5 - Remastered
Czerny Op. 599 Exercise No. 5 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 6 - Remastered
Czerny Op. 599 Exercise No. 6 (No repeat) - Remastered
Czerny Op. 599 Exercise No. 7 - Remastered
Czerny Op. 599 Exercise No. 8 - Remastered
Czerny Op. 599 Exercise No. 9 - Remastered
Czerny Op. 599 Exercise No. 10 - Remastered
Bonus Track: Mozart’s Variations on “Twinkle Twinkle Little Star”, K. 265 - Remastered