thumb|Sugars (clockwise from top-left): white refined, unrefined, brown, unprocessed cane sugar Sugar () is a class of sweet-tasting, soluble carbohydrates, many of which are used in food. Simple su
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 0xaf9cb83dad77749bf3c17c1f0557e48649287c748c9854d379cecb0f0b2e5774. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13183921-be8b-4cf9-80d0-f0198c265d53.json and https://artists.proofprofile.net/proofs/artist/13183921-be8b-4cf9-80d0-f0198c265d53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).