Stephen Nachmanovitch (born 1950) is an American musician, author, artist, and educator. He performs and teaches internationally as an improvisational violinist, and at the intersections of performing
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 0xb00f86552640938812b9b0228bdb39632b36c783f83d2fff5052431b808d4e2e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd231a1a-edc7-45bb-9b7f-6fe8e87a64ff.json and https://artists.proofprofile.net/proofs/artist/fd231a1a-edc7-45bb-9b7f-6fe8e87a64ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).