thumb|Auge and a drunken Heracles, bronze mirror case from Elis (c. 325 BC). National Archaeological Museum, Athens, Stathatos 312.Stewart, p. 112; Bauchhenss-Thüriedl, p. 48 Auge 9; LIMC 22638 (Auge
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 0x01b537b35346122aaef957eb4ae76ca51ac97a77e5fe7d58b1d9e793a0cd25e1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba12cba6-1d62-4be5-a890-90ec676af8bb.json and https://artists.proofprofile.net/proofs/artist/ba12cba6-1d62-4be5-a890-90ec676af8bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).