Jason Ferus Blum (; born February 20, 1969) is an American producer. He is the founder and CEO of Blumhouse Productions, best known for horror franchises including Paranormal Activity (2007–2021), Ins
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 0x95157c6d41e9cd27f87b5792939fb12544ea58ff3d2d6af0977ab8581e8366f0. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0be8a6f-071c-4312-bd86-9e262b9d4cc6.json and https://artists.proofprofile.net/proofs/artist/b0be8a6f-071c-4312-bd86-9e262b9d4cc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).