Linking distributed ledgers to a central data repository is actually the worst of both worlds, in terms of privacy compliance and sheer technical arrogance. Just two ledgers illustrates this.
Managing this monstrosity is impractical with distributed ledger architecture. So. Only one blockchain register. Riiight..
You can't make this stuff up. Shiny suits are pitching it to Canberra as you might Zeppelins. Because. Blockchain.