Margaret JoBeth Williams (born December 6, 1948) is an American actress. She rose to prominence appearing in such films as Kramer vs. Kramer (1979), Stir Crazy (1980), Poltergeist (1982), The Big Chi
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 0xd0095b7afeeb7bf353b4df19a31e195517c70a5904456c27c1579c36016711b4. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b98bc0f6-c0ff-410e-8e4a-9637302b65f0.json and https://artists.proofprofile.net/proofs/artist/b98bc0f6-c0ff-410e-8e4a-9637302b65f0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).