Gustav Adolf Merkel (November 12, 1827, Oberoderwitz, Kingdom of Saxony – October 30, 1885, Dresden) was a German organist and composer. Having been given some lessons by Schumann in his youth, Merke
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 0x4bead091b18717fe6810b9b65475a400d2a340a6d4d8be40c6aa1aecbc46908d. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbc126b5-dd7d-4978-801d-5ef13bb0d268.json and https://artists.proofprofile.net/proofs/artist/fbc126b5-dd7d-4978-801d-5ef13bb0d268.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Complete Organ Sonatas of Gustav Merkel, Vol. 1
The Complete Organ Sonatas of Gustav Merkel, Vol. 3
The Complete Organ Sonatas of Gustav Merkel, Vol. 4
Complete Organ Sonatas of Gustav Merkel (1827-1885) Vol 1 / The Organ of Peterborough Cathedral
Complete Organ Sonatas of Gustav Merkel (1827-1885) Vol 2 / The Organ of Peterborough Cathedral
Complete Organ Sonatas of Gustav Merkel (1827-1885)
The Complete Organ Sonatas of Gustav Merkel