Any home interior contractors on here?

Jim, I have 15' lengths of crown and each wall is about 11'6" right around in there. If I cope for the profile, do I need to miter the other end, or can I just butt one end on the wall, and miter and cope where the crowns come together?

I've only done some patch-in on crowns when we bought the house. The living room was a godaweful baby s*** green that had to go, so I pulled all the existing moldings. Some of the crowns broke as I was taking it down and thankfully there was some crown left from when the house was built.

Robert, sorry, I haven't been on the site in a few days.
You can get away with butting the ends on three walls but the final wall requires a cope on each end. Unless you are a trim carpenter or very lucky, it's difficult to get the length exact on the fourth, double cope wall which is why I splice.