thumb|right|Petra Reski Petra Reski (born 1958, in Kamen) is a German journalist and author renowned for her anti-Mafia publications. Her father came from East Prussia and her mother from Silesia. Sh
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 0x98f8faac2aca27e88fa7c2fb325bd5efe774964a07de8e6b414e84c3d07e9710. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a8d0c27-d36e-4d7f-a5d8-5ee9676eb31a.json and https://artists.proofprofile.net/proofs/artist/1a8d0c27-d36e-4d7f-a5d8-5ee9676eb31a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).