Arsinoi (Greek: Αρσινόη) is a local community (topiki koinotita) of the municipal unit (dimotiki enotita) Ithomi, of the municipality (dimos) of Messini within the regional unit (perifereiaki enotita)
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 0xc99f551e4b05e06a0f9df78cf0129fd81af5d1e8c0329c0294f1d2191a05b9d0. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6acbdf84-50e2-413f-af33-c615ca10de43.json and https://artists.proofprofile.net/proofs/artist/6acbdf84-50e2-413f-af33-c615ca10de43.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).