The Wuzi is a classic Chinese work on military strategy attributed to Wu Qi. It is considered one of China's Seven Military Classics. thumb|Portrait of Wu Qi thumb|page=62|Pages from a Ming dynasty pr
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 0x88a0444d05ec9ea7509f3a8ee83c5ccf8c82b4434222ad4c1293f5b8ae1a2e2f. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6f85105-c87d-43ca-95fd-fd2fff071e61.json and https://artists.proofprofile.net/proofs/artist/f6f85105-c87d-43ca-95fd-fd2fff071e61.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).