Filet may refer to: Filet, Switzerland Filet, a cut piece of meat Filet lace See also Fillet (disambiguation) Philae, an island in Lake Nasser, Egypt Philae (spacecraft), a robotic lander
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 0xfdd1a1254b2e5c0549d410ce51a3ff637a460cb098a767ffe71630723aae5303. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70b5cf8e-9f96-41cd-b28e-0767c5de9dd9.json and https://artists.proofprofile.net/proofs/artist/70b5cf8e-9f96-41cd-b28e-0767c5de9dd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).