Grassi is an Italian surname. Notable people with the surname include: Achille Grassi, Italian Roman Catholic bishop and cardinal Alberto Grassi, Italian footballer Alex de Grassi, American guitaris
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 0xc48b662448ca196f1d015bf88a7c048de0ad4141034ac71b0ea1898e5fe08a0c. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a892876f-e85b-4f66-ab11-9b6b4145bd5c.json and https://artists.proofprofile.net/proofs/artist/a892876f-e85b-4f66-ab11-9b6b4145bd5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).