All ordinances and resolutions shall be filed and safely kept and duly recorded by the City Clerk as a permanent record. A copy certified by the City Clerk shall be prima facie evidence of the contents of such ordinances or resolutions and of the due passage and publication of the same, and shall be admissible in evidence in any court of this State, or in any proceeding where the contents of such ordinance or resolution, or any of them, is in question; provided, however, that nothing herein contained shall be construed to prevent the proof of the passage and publication of any ordinance or resolution in the manner otherwise prescribed by law.