Sync and synch are abbreviations of synchrony, or synchronization, the coordination of events to keep them in time. The opposite of synchrony is asynchrony. Sync or synch may also refer to: Computin
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 0x01dcc9dc295c254907a53631d8d62f9a41365a7cd03b3442fd50699768023e91. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76b4e575-5fcf-4d38-bd8a-131be7cd5fc2.json and https://artists.proofprofile.net/proofs/artist/76b4e575-5fcf-4d38-bd8a-131be7cd5fc2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).