As mentioned in the title, sometimes the desktop or mobile application used to process/edit a photo, especially if it has been moved, copied, re-saved, etc.. would cause the very original date of the image, the date it has been shot the first time, to change or even disappear. One would then be stuck with a "fake" date that reflects the date on which the image has been processed or saved last time.
Now does the original date remain "engraved" there, somewhere, no matter how much editing/processing work an image has undergone? Is it encrypted, or embedded somewhere in the file metadata or the EXIF data? In this case, is there any tool/software that can retrieve that original date from where it still is?
I know.. too much interrogations. Any help in this matter is truly appreciated.