Anton Heiller (15 September 1923 – 25 March 1979) was an Austrian organist, harpsichordist, composer and conductor. Biography Born in Vienna, he was first trained in church music by Wilhelm Mück, org
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996aa2fd0437be86ed7a6a640b3a9be4de88fa1d1d6e3fff2737fe0f7ebdbbb3. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e608c9c3-f8b1-4222-90c3-9e9ee9beb3be.json and https://artists.proofprofile.net/proofs/artist/e608c9c3-f8b1-4222-90c3-9e9ee9beb3be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J.S. Bach: Mass in B Minor, BWV 232 (Remastered 2023)