thumb|Heinz Drache Heinz Drache (; 9 February 1923 – 3 April 2002) was a German film actor. He appeared in more than 40 films between 1953 and 2002. He was born in Essen, Germany and died in Berlin,
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 0x726822eb58a945b174c321c1a5f5f566ca4ca8d57151c17ca7c7d12ef7316c9e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af264125-16d4-48ca-9fba-7929d48d68b1.json and https://artists.proofprofile.net/proofs/artist/af264125-16d4-48ca-9fba-7929d48d68b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).