upright=1.35|thumb|Dutch Topographic map of Brielle, June 2015 Brielle (), also called Den Briel in Dutch and Brill in English, is a town and historic seaport in the western Netherlands, in the provin
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 0xfb5f41f78cdf466d5b5752264a44d32e1dc01353417485fd7a548d6e2474b490. 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/12527804-08cc-4a93-b585-e2c0aeca9d64.json and https://artists.proofprofile.net/proofs/artist/12527804-08cc-4a93-b585-e2c0aeca9d64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).