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 0x21f0381b258967e0e219c3dcca396f4e2174473e5b7dfbbfd2792f6367260b5f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932ad7f1-337f-4b9c-bd26-4eb9796f7f35.json and https://artists.proofprofile.net/proofs/artist/932ad7f1-337f-4b9c-bd26-4eb9796f7f35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Catch [Sie sagt, er sei perfekt. Doch ich weiß, dass er lügt ... (ungekürzt)]