Gradis is a surname. Notable people with the surname include: Gaston Gradis (1889-1968), French businessman and explorer Henri Gradis (1823-1905), French businessman and historian Raoul Gradis (1861-
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 0x8e146665b328f0b53587342ed89324a1d98ca50bc222f737332081a84acebd53. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c993a56c-095f-4db7-aa11-3fc15d87f92b.json and https://artists.proofprofile.net/proofs/artist/c993a56c-095f-4db7-aa11-3fc15d87f92b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).