Cukier is a Polish surname meaning sugar. Notable people with the surname include: Aniela Cukier (1900–1944), Polish painter Heni Ozi Cukier, Brazilian political scientist, professor, author, and p
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 0xe72ffc73e580956275411cab99c840882d520f595b5c389280303707c1508c4f. 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/11cecf89-7e5f-4700-b3d0-4beca7d77542.json and https://artists.proofprofile.net/proofs/artist/11cecf89-7e5f-4700-b3d0-4beca7d77542.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).