thumb|Pressler in 2012 Mirjam Pressler, born Mirjam Gunkel (18 June 1940 – 16 January 2019) was a German novelist and translator. Being the author of more than 30 children's and teenage books, she als
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 0x9ab8e5796ecbc8372a9cc6dcbe45f0fcdd70666a8adf91cc8d39018ace3bf77e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f22d869-3500-4db8-bfc8-a21a46720737.json and https://artists.proofprofile.net/proofs/artist/8f22d869-3500-4db8-bfc8-a21a46720737.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).