if you look at the end of the link the 5 digit number is the topic # and anything after the back slash / is the post number in that topic, so when you copy the link and paste just remove everything after the topic # and they will bring the link to the top of the topic!
If you look at the URL for this post it is /8 If you go to the url and backspace out the /8 it will bring you to the top of this topic!