thumb|330x330px|A wooden pier in Corfu, Greece A pier is a raised structure that rises above a body of water and usually juts out from its shore, typically supported by piles or pillars, and provides
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 0x7e4e63a70beec8365f932a2b9fbf5699999adbc111c2cee199c3cd9a6f8ff229. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83d12188-7d91-44a0-a2d1-6e500a380bf9.json and https://artists.proofprofile.net/proofs/artist/83d12188-7d91-44a0-a2d1-6e500a380bf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).