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 0xfd25109b219e0e35c37f6456b55167f88b41c4800042bbdbe68dc5c7badefe9f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91e2319a-ee64-4647-b640-346f51ea810d.json and https://artists.proofprofile.net/proofs/artist/91e2319a-ee64-4647-b640-346f51ea810d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Trees No. 3 in G sharp Minor, Op. 75: Aspen
Alexander scriabin: impromptu à la mazur op 2 no 3
Arabeske in C Major, Op. 18 (Studio version)
Lieder ohne Worte No. 6 in F sharp minor, Op. 30: Venetianisches Gondellied
Prelude No. 1 in C Major, Op. 28: Agitato
Prelude No. 2 in C Minor, BWV 847: The Well Tempered Clavier
The Seasons No. 6 in G Minor, Op. 37: Barcarolle