Pieter van der Westhuizen, (born 24 December 1937) was a South African Army officer who served as the Chief of Staff Intelligence from 19781985 and later Secretary of the State Security Council. Mi
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a246c24443d449202a3d4adb7d7ead3e888ec9466e2d8c507a23ff06e20301d. 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/8c84f590-9145-4f74-acb1-64f38fe7ede3.json and https://artists.proofprofile.net/proofs/artist/8c84f590-9145-4f74-acb1-64f38fe7ede3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).