Is 1 hour and 15 minutes enough for transit in Amesterdam airport?

I have a D type shcengen visa of Germany. I booked a ticket from KIM website itself from Istanbul to berlin. The issue is my passport would be checked in Amesterdam and stamped I think. I am not going to take my luggage since it is one time ticket and I will get two tickets from departure in Istanbul. The issue is my layover is 1 hour and 15 minutes. since I am going just in transit but my passport will be stamped is it enough?
I asked klm they said that no problem. however, I really am not sure for this. If delayed what happened or if took more than expected? The next flight is 18 hours later which is really boring.
Any idea?