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 0x4f5cd0c48befef0c54bc3e18616b3f0d4e58b6af896722e762424c9292fc40a0. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f04ac05b-4449-4a3c-8860-a86511d5bf74.json and https://artists.proofprofile.net/proofs/artist/f04ac05b-4449-4a3c-8860-a86511d5bf74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Prelude
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Allemande
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Courante
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Sarabande
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Bourrees
Bach: Solo Cello Suite No. 3 in C Major (BWV 1009)---Gigue
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Prelude
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Allemande
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Courante
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Sarabande
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Bourrees
Bach: Solo Cello Suite No. 4 in E-Flat Major (BWV 1010)---Gigue
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Prelude
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Allemande
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Courante
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Sarabande
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Menuets
Bach: Solo Cello Suite No. 1 in G Major (BWV 1007)---Gigue
Vesperae solennes de confessore, K. 339: Laudate Dominum
Mozart - The 50 Best Classical Masterpieces
Bist du bei mir, BWV 508 (From "Notenbüchlein für Anna Magdelena Bach")
Chamber Music: Alvin Lucier & Morton Feldman