Ownership-chain sanctions screening: resolve a company (by LEI or name), walk its corporate ownership chain via GLEIF Level 2 relationship data (direct parent, ultimate parent), and screen every entity in the chain — including transliterated and alternate names — against OFAC SDN, EU consolidated, and UN Security Council lists. Catches the case where your counterparty is clean but its parent is sanctioned. Unique combination of KYB registry resolution and sanctions screening.