Jan Freidlin (Hebrew: יאן פריידלין; Ukrainian: Ян Михайлович Фрейдлін) is a Soviet (Ukrainian SSR) and Israeli composer. He is the author of works for solo instruments, ensembles and orchestras, as we
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 0x1016b07b724c0952a49f2493755963bcfe696f971ae9b5df00f80f9c388ae79b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90e779c7-095f-4fa9-881e-cd704fe811f6.json and https://artists.proofprofile.net/proofs/artist/90e779c7-095f-4fa9-881e-cd704fe811f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).