The Brood is a 1979 Canadian psychological body horror film written and directed by David Cronenberg, and starring Oliver Reed, Samantha Eggar, and Art Hindle. Its plot follows a man and his mentally
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 0x2b45b77a97164c3107d113890fb9db166dc3c016a2b14c9daf3be46716ff5029. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13d9d0ca-426a-42cf-a0ef-fccd0bebb071.json and https://artists.proofprofile.net/proofs/artist/13d9d0ca-426a-42cf-a0ef-fccd0bebb071.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.