Zandra is a given name. Notable people with the first name Zandra include: Zandra Ahl (born 1975), Swedish designer, artist, and author Zandra Borrero (born 1973), Colombian sprinter Zandra Flemister
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 0x216842e36fb8df841ff39a4642e9c2acec50b13da5993d5a6ea34c8e48b8883c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2164ca6c-911f-4b61-a077-16cf7835dd68.json and https://artists.proofprofile.net/proofs/artist/2164ca6c-911f-4b61-a077-16cf7835dd68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).