alt=Rotel A10 amplifier|thumb|Rotel A10 amplifier Rotel is a family-owned Japanese manufacturer of hi-fi audio and video equipment: home theater, amplifiers, compact disc players, etc. Rotel was start
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 0xb54b19463d1a91ec5453fd976d1fadec8bd02ba707e6e81ce63b0a57deeee65e. Chain 2 (Bitcoin): anchored in block 954032 (2026-06-17T01:59:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3974814f-88d5-4b7f-bfa2-0d28d41248d2.json and https://artists.proofprofile.net/proofs/artist/3974814f-88d5-4b7f-bfa2-0d28d41248d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).