Zero Effect is a 1998 American mystery comedy film written and directed by Jake Kasdan in his feature directional debut. Starring Bill Pullman as "the world's most private detective", Daryl Zero, and
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 0x755e1add5f813d1112a69c8ce5318f39f70e37c4413a0a3a321fc55f7f95234d. 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/e02cd5d4-e072-4309-9655-ff483c3db315.json and https://artists.proofprofile.net/proofs/artist/e02cd5d4-e072-4309-9655-ff483c3db315.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).