Marvel Marilyn Maxwell (August 3, 1921 – March 20, 1972) was an American actress and singer. In a career that spanned the 1940s and 1950s, she appeared in several films and radio programs, and enter
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c913ab3e2bd267d5c781b5543b557c72ff5cd11d6f80be9737af1eceafd4f8. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc0b8e17-c0c2-429f-a07e-49cf0fd1b18c.json and https://artists.proofprofile.net/proofs/artist/bc0b8e17-c0c2-429f-a07e-49cf0fd1b18c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).