Rolle () is a municipality in the Canton of Vaud in Switzerland. It was the seat of the district of Rolle until 2006, when it became part of the district of Nyon. It is located on the northwestern sho
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 0xf8ce095551f3c02304864dc16d2ce428fce939a05b158c072c3c2204ffbd1bf4. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b009350-1fc4-4bf2-a842-91107ff869e9.json and https://artists.proofprofile.net/proofs/artist/3b009350-1fc4-4bf2-a842-91107ff869e9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).