Howard Michael Mandel (born November 29, 1955) is a Canadian comedian, television personality, actor, and producer. Mandel is known for voicing Gizmo in the 1984 film Gremlins and the 1990 sequel Grem
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 0x9163383def8e122343f37d795240ced18950de29a21e77534f921bd68b3e81fa. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/442599f1-806e-4c27-a8bb-b8840c7afb71.json and https://artists.proofprofile.net/proofs/artist/442599f1-806e-4c27-a8bb-b8840c7afb71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Howie Mandel Presents: Howie Mandel at the Howie Mandel Comedy Club