The Hamburger Ratsmusik was the name, in German, for the Hamburg city government musical establishment of Hamburg during the baroque period. Ratsmusik was a generic term to distinguish from Hausmusik,
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 0x08bb79d437944c64f8ca8463752c57cf071d70ba27b8fb4d65099c98889870ff. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8287426c-8323-4f52-8b96-f6f37902b9e0.json and https://artists.proofprofile.net/proofs/artist/8287426c-8323-4f52-8b96-f6f37902b9e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Baroque Music (Instrumental and Chamber Music) - Marais, M. / Visee, R. De / Couperin, F. (Musical Thoughts - Life and Death)
Musik von Carl Friedrich Abel & Aktuelles
Euch ist ein Kindlein heut geborn. Luthers Weihnachtslieder in Sätzen aus der Reformationszeit
Euch ist ein Kindlein heut geborn: Luthers Weihnachtslieder
Persia & Baroque: Classical Persian Music and European Baroque