Loket (; ) is a town in Sokolov District in the Karlovy Vary Region of the Czech Republic. It has about 3,100 inhabitants. The town is known for the Loket Castle, a 12th-century Gothic castle. The his
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 0xa71b71cf36602041706866cb90c88b0d3a3100aa073fdae5764147d6bd388e0e. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3bd58ab-d419-439e-a5fe-0036cdf26f04.json and https://artists.proofprofile.net/proofs/artist/b3bd58ab-d419-439e-a5fe-0036cdf26f04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).