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 0x4d3d19d79c2f65c2c8759678de9ffb5fce2a16658330e6e8272787d0f94b13c9. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a354e809-dabb-4d25-b353-92031951b11c.json and https://artists.proofprofile.net/proofs/artist/a354e809-dabb-4d25-b353-92031951b11c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
24 Preludes, Op. 11: No. 8 in F-Sharp Minor
24 Preludes, Op. 28: No. 8 in F-Sharp Minor
24 Preludes, Op. 11: No. 10 in C-Sharp Minor
24 Preludes, Op. 28: No. 10 in C-Sharp Minor
24 Preludes, Op. 11: No. 12 in G-Sharp Minor
24 Preludes, Op. 28: No. 12 in G-Sharp Minor
24 Preludes, Op. 11: No. 13 in G-Flat Major
24 Preludes, Op. 28: No. 13 in F-Sharp Major
24 Preludes, Op. 11: No. 14 in E-Flat Minor
24 Preludes, Op. 28: No. 14 in E-Flat Minor
24 Preludes, Op. 11: No. 15 in D-Flat Major
24 Preludes, Op. 28: No. 15 in D-Flat Major, "Raindrop"
24 Preludes, Op. 11: No. 16 in B-Flat Minor
24 Preludes, Op. 28: No. 16 in B-Flat Minor
24 Preludes, Op. 11: No. 17 in A-Flat Major
24 Preludes, Op. 28: No. 17 in A-Flat Major
24 Preludes, Op. 11: No. 19 in E-Flat Major
24 Preludes, Op. 28: No. 19 in E-Flat Major
24 Preludes, Op. 11: No. 21 in B-Flat Major
24 Preludes, Op. 28: No. 21 in B-Flat Major