Elvina may refer to: Places Castro de Elviña, ruined site in Galicia, Spain Elviña, Spain, town where the Battle of Corunna took place during the Peninsular War Elvina, former name of the Ajax Copper
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 0xe81c524f93030489e0a7f461d87e6331e08dc9c51b006e5c0029877bac913bce. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2abf1637-aad7-438f-b4ff-ac291fdd27b6.json and https://artists.proofprofile.net/proofs/artist/2abf1637-aad7-438f-b4ff-ac291fdd27b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).