right|thumb|300px|A contemporary navaja of traditional design, with a blade The navaja is a traditional Spanish folding-blade fighting and utility knife.de Rementeria y Fica, Mariano, Manual of the
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 0xe625bdbd479db015c69cf54ea08c127b7d779206541458613f8deac66f939e12. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3cd1bbd-cb11-4619-ae19-39438fee1675.json and https://artists.proofprofile.net/proofs/artist/b3cd1bbd-cb11-4619-ae19-39438fee1675.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).