The euro (symbol: €; currency code: EUR) is the official currency of 21 of the member states of the European Union. This group of states is officially known as the euro area or, more commonly, the eu
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 0xd03b7eea0a6962384e43a623154295c5701c34e44373ba554f37267edff63b06. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e90408c0-20bf-4dfd-be49-bf17d6978395.json and https://artists.proofprofile.net/proofs/artist/e90408c0-20bf-4dfd-be49-bf17d6978395.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).