Karen Dreyfus is an American violist who currently teaches at the USC Thornton School of Music. Ms. Dreyfus has distinguished herself as a recipient of many prizes, including the Naumburg Viola Compet
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 0xc53ee90997e15877f0d0da630e65a49159160d7cfa6798587b64924ba1f4769f. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.json and https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Glenn Dicterow Plays Bernstein, Martinå¯, Korngold and Corigliano