Vitaly Iosifovich Margulis (16 April 192829 May 2011) was a Ukrainian-born classical pianist, musicologist and teacher. Biography Vitaly Margulis was born in the city of Kharkov in the USSR (now Khar
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 0xc4413d691ed90eca816b3f6ab42029fa4bea825acd0faf07a1b57a84ec3a234a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6c94ba9-913b-42dc-8f37-e1b4319aa7f1.json and https://artists.proofprofile.net/proofs/artist/c6c94ba9-913b-42dc-8f37-e1b4319aa7f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).