thumb|Archaic inscription (, "to the king") on ceramic fragment, here shown upside down; a warrior bearing a spear and mounted on a horse is also depicted. (Greek: ; from earlier , ) is an ancient G
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 0x6b7ac8dc1202af38cc2f89bd0e73866955ab4f29b22b635cb423ed2603bd59f2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c1ed41d-1b0f-42c7-8f81-715184ee01cc.json and https://artists.proofprofile.net/proofs/artist/7c1ed41d-1b0f-42c7-8f81-715184ee01cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).