thumb|upright=1.35|US artillerymen test fire an M777 Lightweight 155-millimeter Howitzer at Marine Corps Air Ground Combat Center Twentynine Palms (2005) Artillery consists of ranged weapons that lau
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 0xeefbed502d62c1501a29a72893c2b3c79f529a5fc60d590cc5340617d18e1b5b. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a407b5a-ddfc-4f0e-be10-0669494cce24.json and https://artists.proofprofile.net/proofs/artist/1a407b5a-ddfc-4f0e-be10-0669494cce24.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).