Vojislav "Vojkan" Borisavljević (5 May 1947 – 23 February 2021) was a Serbian composer and conductor.Preminuo Vojkan Borisavljević, b92.net, 23. 2. 2021. He composed more than five hundred songs for
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 0xb13a708f8f3eef998eb3594dd0aceee920ab74dc6123783bf6738d59b71a6895. 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/597b2767-d130-4146-b4ee-12708dbad7ed.json and https://artists.proofprofile.net/proofs/artist/597b2767-d130-4146-b4ee-12708dbad7ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vojkan Borisavljević: Odiseja (Muzika Klasika 31, april 2018.)