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 0x81a0abcc100bf883bbf226faaab4aa8f1fd35d9bc55686aec4e49aab085d3015. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0562ff7a-9292-4194-9eb6-9cb77d56ea05.json and https://artists.proofprofile.net/proofs/artist/0562ff7a-9292-4194-9eb6-9cb77d56ea05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Lutherkantaten, Vol. 4 (BWV 38, 80, 61)
Bach: Lutherkantaten, Vol. 3 (BWV 126, 4, 2, 7)
Bach: Lutherkantaten, Vol. 1 (BWV 62, 36, 91)
Haydn: L'incontro improvviso, Hob. XXVIII:6
Fürstenthal: Songs and Ballads of Life and Passing
200 Jahre Weltfriedenslied: Stille Nacht! Heilige Nacht!