HWZ may refer to: HardwareZone Heidemarie Wieczorek-Zeul, German politician (SPD) and former federal minister Zurich University of Applied Sciences in Business Administration (German ), in Switzer
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 0xd541efa84ef1bbc44a4de56db06a5af79acd45b87527d0b8ccc1f0f3826a91c9. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d423198d-e193-4f92-a3f5-e14f15a3f15c.json and https://artists.proofprofile.net/proofs/artist/d423198d-e193-4f92-a3f5-e14f15a3f15c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).