§ 319. Time of recording. The recording officer must make an entry in the record, immediately after the copy of every instrument recorded by him, stating the hour, day, month and year, when it was recorded, and must endorse upon every such instrument a certificate, stating the time as aforesaid, when, and the book and page where, the same was recorded. If the recording is by microphotography or other photographic process, the recording officer must endorse on the instrument the hour, day, month and year when it was recorded, and the serial number or such other designation as will permit easy reference to the record of such instrument, and he must, in addition, place thereon a certificate stating that the instrument has been recorded in deeds or mortgages as the case may be.