Advocaat ( , ) or advocatenborrel is a traditional Dutch alcoholic beverage made from eggs, sugar, and brandy. The rich and creamy drink has a smooth, custard-like consistency. The typical alcohol con
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 0xeff972d307dffdd5ad1b4ff6db4658358be622f48aa7d3c2ab0d478c24c666f0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/704e6a8a-b1e9-4f8d-b188-07fde7aeb543.json and https://artists.proofprofile.net/proofs/artist/704e6a8a-b1e9-4f8d-b188-07fde7aeb543.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).