Jordan Nikolić (; 11 May 1933 – 26 April 2018) was a Serbian folk singer who interpreted traditional songs from Kosovo. Biography Nikolić was born on 11 May 1933, in Prizren, Kingdom of Yugoslavia. H
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 0xf6f82b8958f1f8954bb70b413b2df33aec66c68ae0e4eb037bfaccfe44e31d6b. 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/5b8e3cd2-8161-49b2-90ba-f58a1c67c5b0.json and https://artists.proofprofile.net/proofs/artist/5b8e3cd2-8161-49b2-90ba-f58a1c67c5b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).