Belgium
Bureau Sécurité juridique
Grundbuchamt
A court keeps it, and entry is what makes you owner.
Property & housing
2 entries, read from Belgium to Germany.
partial
Belgium
Notaire
Notar + Grundbuchamt
Lower tax, and the register itself guarantees the title.
Each entry cites its sources and shows when it was last checked. Where no equivalent exists, the entry says so.