right|thumb|Portrait of the composer Friedrich Wilhelm Kücken (16 November 1810 – 3 April 1882) was a German composer and conductor. He was a very prolific composer, mainly known for light and melodio
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 0x47523f04013242a040311254437a53f70f98bd3819430ad784c14e7bb4a97260. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63090ba6-2a3c-42a3-895a-a89d530f2e0a.json and https://artists.proofprofile.net/proofs/artist/63090ba6-2a3c-42a3-895a-a89d530f2e0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Friedrich Wilhelm Kücken: Romantische Lieder - Romantic Songs
Friedrich Wilhelm Kücken: Romantische Lieder - Romantic Songs: Die stille Wasserrose, Op. 47 No. 3
Friedrich Wilhelm Kücken: Romantische Lieder - Romantic Songs: Das Wasser ist tief, Op. 78
Friedrich Wilhelm Kücken: Romantische Lieder - Romantic Songs: Curiose Geschichte, Op. 17 No. 14
Friedrich Wilhelm Kücken: Romantische Lieder - Romantic Songs: Der Himmel hat eine Träne geweint, Op. 63
Liebes Kücken,... (Friedrich Wilhelm Kücken: Werke für Männerchor)