Syke () is a town in the district of Diepholz, Lower Saxony, Germany. It is situated approximately 20 km south of Bremen. thumb|242px|Syke Town Hall thumb|222px|Syke Population 1961: 16,203 1970:
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 0x5100e14c8ff2d046a46a32580220b831aea0e73c7d5c8f46931fda045360260a. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02408ff2-3be0-4e36-8c66-753158afc485.json and https://artists.proofprofile.net/proofs/artist/02408ff2-3be0-4e36-8c66-753158afc485.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).