In ancient Greek mythology and religion, Eurus () is the god and personification of the east wind, although sometimes he is also said to be southeast specifically. He is one of the four principal wind
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 0x5f0a92e4f3d9a6068f79e03827578f3975e1b8cc95434753a7c45f0319359bd8. Chain 2 (Bitcoin): anchored in block 953857 (2026-06-15T23:34:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/022ae311-726e-43da-8665-a6792bc3eec7.json and https://artists.proofprofile.net/proofs/artist/022ae311-726e-43da-8665-a6792bc3eec7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).