thumb|Prehn in 2023 Anette Prehn (born 1975) is a Danish author, sociologist, keynote speaker and MD of Centre for Brain-Based Leadership and Learning. She is the author of 20+ non-fiction books abo
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 0xa114fac5a5f33ca2d40a0bf7ae868e3489af51da8550ab2059d516d87ccdd0ff. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4ff34d3-d6bf-4c17-9cd6-f6171571df36.json and https://artists.proofprofile.net/proofs/artist/c4ff34d3-d6bf-4c17-9cd6-f6171571df36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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