250px|thumb|Bohemia, Joachimsthaler 1525. Obverse, picturing St. Joachim. thumb|Bohemia, Joachimsthaler 1525. Reverse, picturing the Bohemian Lion. The tolar () or Jáchymovský tolar was a silver coin
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 0x075b0b12eeb147c19cbc6ff3b4e5c3de3bc32e88244f3640ff74fdaa744fa3cc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4c9a1a5-b0a5-4d59-9215-bd1cbe032c7f.json and https://artists.proofprofile.net/proofs/artist/b4c9a1a5-b0a5-4d59-9215-bd1cbe032c7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).