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 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 0x4bead091b18717fe6810b9b65475a400d2a340a6d4d8be40c6aa1aecbc46908d. 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/fbc126b5-dd7d-4978-801d-5ef13bb0d268.json and https://artists.proofprofile.net/proofs/artist/fbc126b5-dd7d-4978-801d-5ef13bb0d268.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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)
Sonate In D-Moll Zu Vier Händen Und Doppelpedal, Op. 30 - I Allegro
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x2f8e50e01bcc629e95b410cc37884ec34fa7ad34bbc7ee70554dd529815725ba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOFZS0973050 — a six-check JSON result.
The Complete Organ Sonatas of Gustav Merkel