thumb|upright=1 | Mackerel tabby, with the distinctive striped pattern and forehead 'M'. thumb|A European wildcat (Felis silvestris) bearing a similar coat pattern to that of a tabby cat. It is thoug
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 0x169965483ec5db280a9d197a7c71dc7e5b0b24f0671e737f1392090af76acfcb. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bed6422-dfa2-4d2e-b51e-ac10b0a0bfc2.json and https://artists.proofprofile.net/proofs/artist/3bed6422-dfa2-4d2e-b51e-ac10b0a0bfc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).