Lívia Rév (5 July 1916 – 28 March 2018) was a Hungarian classical concert pianist. Career Rév was born in Budapest as Lili Rauchwerger. She began her studies with Margit Varró and Klára Máthé. Aged n
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 0xca0122c97380656db237a6796f5af6d383749971309c90f97df941d9e077d912. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2042424-40a8-4834-bfc7-16b8dfc3f77d.json and https://artists.proofprofile.net/proofs/artist/e2042424-40a8-4834-bfc7-16b8dfc3f77d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For Children: Piano Music for the Young to Play and Enjoy