Cristal may refer to: Cristal Global, chemical company Cristal (wine), a brand of champagne Cristal (aguardiente), brands of aguardiente Cristal (1985), a Venezuelan telenovela Cristal (2006), a
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 0x03d99494362c422ecfe4e9f3c4d5b5de9e749f94d874f055169af53290b2cbc4. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad67b21c-3aea-46ff-9696-f612ae668d25.json and https://artists.proofprofile.net/proofs/artist/ad67b21c-3aea-46ff-9696-f612ae668d25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).