thumb|Václav Talich Václav Talich (; 28 May 1883, Kroměříž – 16 March 1961, Beroun) was a Czech conductor, violinist and later a musical pedagogue. He is remembered today as one of the greatest condu
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 0xe4670236359a8979b1d44187f5395496a3fbe07cd953af53f7cf79264a04f007. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25587ef3-9fab-4827-8c19-dc7c5b818b5b.json and https://artists.proofprofile.net/proofs/artist/25587ef3-9fab-4827-8c19-dc7c5b818b5b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Tchaikovsky: Piano Concerto NO. 1, OP. 23 - Violin Concerto, OP. 35
Dvořák: Symphonic Variations, Op. 78, B. 70 - Prokofiev: Romeo and Juliet, Op. 64