alt=Illustration by James Allen St. John for Tarzan and the Golden Lion|thumb|upright=1.1|Illustration by James Allen St. John for Tarzan and the Golden Lion Tarzan (John Clayton, Viscount Greystoke)
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 0x8544d5532bb423c02d0ffce24b58abf73823b8eb475ccc272a39d8ff55e06e89. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03dbdc87-c753-43fa-a6be-b49bfa6dba06.json and https://artists.proofprofile.net/proofs/artist/03dbdc87-c753-43fa-a6be-b49bfa6dba06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).