thumb|upright=1.5|A phylogenic model depicts (from lower right) Homo erectus spreading from Africa to Eurasia around 1.8 millions of years ago. Its descendant H. heidelbergensis originated Denisovans,
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 0x6d27cb1e172ac0d9f250c2429eab60e3b7f76f10ebeedbe7fa892262c8fc27a2. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e18b22e3-c79e-419b-913b-37a313c2376a.json and https://artists.proofprofile.net/proofs/artist/e18b22e3-c79e-419b-913b-37a313c2376a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).