Focus (: foci or focuses) may refer to: Arts Focus or Focus Festival, former name of the Adelaide Fringe arts festival in East Australia Film Focus (2001 film), a 2001 film based on the Arthur Mil
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 0x08e9b485bfae4920a4be4f0446d910e67a531052003f484509967f73c6994640. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f56a4e2-7d08-49f3-9e33-0968acb17e7a.json and https://artists.proofprofile.net/proofs/artist/0f56a4e2-7d08-49f3-9e33-0968acb17e7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Focus Frequencies: Music for Clarity and Productivity