Z6 may refer to : Z6 small nucleolar RNA Motorola ROKR Z6, a cell phone SP&S Class Z-6, a steam locomotives class, see List of Spokane, Portland and Seattle Railway locomotives Harbin/CHDRI Z-6, o
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 0xdfc26c0dbce88f15f926ee5650b725c6f256f38394890538247b8a014d4eb1d4. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30fcd498-87b9-48c0-a8c5-38ac0a4fd580.json and https://artists.proofprofile.net/proofs/artist/30fcd498-87b9-48c0-a8c5-38ac0a4fd580.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).