Azul, meaning "blue" in Spanish and Portuguese, may refer to: Arts and entertainment Azul (Los Piojos album), 1998 Azul (Cristian Castro album), 2001 "Azul" (song), the title song Azul Azul, a Bo
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 0xa658a4e7f627f7347a32b6b3dcebbb5360bc67f69ed016ff140fa34923df4a09. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea6659e8-3bb8-4777-969a-b4f046f39869.json and https://artists.proofprofile.net/proofs/artist/ea6659e8-3bb8-4777-969a-b4f046f39869.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).