just about any camcorder has a time/date stamp. Curious however abut you being able to find one that cannot be edited. one can always write over a tape, but each tape does have a write proitect tab you can slide over. However the one advantage of the mini dvde is the ease of loading to a PC so one COULD edit it etc.

the part I do not know much about is if the trick for you is to lad it to a OC, then make a DVD or somehting that cannot be edited. not sao much finding a camera that you can amke tapes that cannot be edited, but instead after you tape then making a dvd that cannot be edited