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 0x8fb9a155339940673b3b206bc8ed89dc78606d5de95ace82e0bc21f434825214. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52599630-c938-47e8-8a4d-5fcd73a47627.json and https://artists.proofprofile.net/proofs/artist/52599630-c938-47e8-8a4d-5fcd73a47627.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
24 pieces for children, Op. 39 nº 20, Clowns
La Candeur (Twenty-five easy and progressive studies)
Minuet in G major, BWV Anh. 114 (Notebook for Anna Magdalena Bach, 1725)