Josef Chuchro (3 July 1931 – 19 August 2009) was a Czech cellist. Life and career Josef Chuchro was born on 3 July 1931 in Prague. His father Josef Chuchro senior (1903–1975), who was an organist, pr
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 0x048ce27b45f29c8f1598dbce9a8490e60530cbed962c3276caaf92e61e53418a. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc36b839-15b5-4dea-8b20-4524cedefae2.json and https://artists.proofprofile.net/proofs/artist/dc36b839-15b5-4dea-8b20-4524cedefae2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Grandes Épocas de la Música. Beethoven: Concierto Op. 56, Sonata No. 10 Op.96