§ 373. Registrar's bond. Every registrar, before entering upon his duties as registrar, shall give a bond with sufficient security, to be approved by a justice of the supreme court, payable to the people of the state of New York, in a penal sum the same as that for his bond as register or county clerk or in a sum which may be fixed by the county board of supervisors, conditioned for the faithful discharge of his duties, and to deliver up all papers, books, records and other property belonging to the county or appertaining to his office as registrar of titles, whole, safe and undefaced, when lawfully required so to do, which bond shall be filed in the office of the secretary of state.