Margaret Kathleen Regan (September 14, 1916 – April 10, 1980), better known as Kay Medford, was an American actress and singer. For her performance as Rose Brice in the musical Funny Girl and the film
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 0x348c8f4e87bd50f781aac97f3ce33830d97e5d3d56af7ec49232eacdb5f52e01. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0aec5584-7ceb-40d9-ac12-0d72941a7e37.json and https://artists.proofprofile.net/proofs/artist/0aec5584-7ceb-40d9-ac12-0d72941a7e37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).