Sire is an archaic respectful form of address to reigning kings in Europe. In French and other languages it is less archaic and relatively more current. In Belgium, the king is addressed as "Sire..."
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 0xdf6c441d7fbc2d5d14e611fa3fdee85a4f7a8be5b501e69c55b46358b7fe6e62. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72ff5879-596b-4a35-a436-5209a7682e11.json and https://artists.proofprofile.net/proofs/artist/72ff5879-596b-4a35-a436-5209a7682e11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).