thumb|Ignaz Brüll Ignaz Brüll (7 November 1846 – 17 September 1907) was a pianist and composer from Austria-Hungary. Born in Moravia, he lived and worked in Vienna. His operatic compositions included
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 0x914703d728114b4e89fc736b2f2eeaff8d7668162c18e5f6a810a53fc4cae530. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8023fae-3707-42fb-9ad5-183708002fb9.json and https://artists.proofprofile.net/proofs/artist/f8023fae-3707-42fb-9ad5-183708002fb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brüll: Piano Concertos Nos. 1 & 2 (Hyperion Romantic Piano Concerto 20)