Karl Haas (December 6, 1913February 6, 2005) was a German-American classical music radio host, known for his sonorous speaking voice, humanistic approach to music appreciation, and popularization of c
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 0x0546da58790fb6a7c8595157a87cc2d4ba2e1dc96ecbcd4f6620ae1b61166b82. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.json and https://artists.proofprofile.net/proofs/artist/c6496df8-7f0a-4f68-b391-f5373b723ac6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Concerto for 2 Harpsichords in C minor, BWV. 1060