Zaira may refer to: People Zaira Bas (born 1994), Spanish beauty queen Zaira Cosico, Filipino ballerina Zaira Nara (born 1988), Argentine model Zaira Ollano (1904–1997), Italian physicist Zaira Wasim
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 0x581c21323b3b4c03c42d9c33318fe97c7c9636aacbe289864c3a67a4d3206817. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f285a10-b6c4-47e7-8799-34e194938dd3.json and https://artists.proofprofile.net/proofs/artist/1f285a10-b6c4-47e7-8799-34e194938dd3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).