copyright

The copyright is implicit when you create any original artistic work.  It is confirmed when you "publish" (publicly release) the work. Otherwise, if someone else created the exact same thing you did and published it first, THEY would own the copyright.

It's not an absolute necessity, but it's a very good idea to attach your copyright to any published work.  (© Joe Schmo 2010)

Hi,

this is an extract from the EULA of MAGIX:

6. USE OF THE MUSIC, VIDEO AND PHOTO FILES

The music, photo and video files included in the MAGIX products may be used only for non-commercial purposes (exclusively for private purposes).
Only the music files contained in MAGIX Music Maker and MAGIX Soundpool DVD Collection may be used within newly-created musical works for commercial purposes too.

That means if you only use Content from Music Maker or the Soundpool Collection, you can use it for commercial purpose.

I don´t know how this copyright thing works - but I guess you have to declare the copyright for it - but i´m not sure.

Hope this helps you.
Cheers