De or het copyrighthouder?

The correct Dutch article is:

de copyrighthouder

How to use copyrighthouder

the copyrighthouderde copyrighthouder
this copyrighthouderdeze copyrighthouder
that copyrighthouderdie copyrighthouder
our copyrighthouderonze copyrighthouder
your copyrighthouderjouw copyrighthouder
every copyrighthouderelke copyrighthouder
which copyrighthouder?welke copyrighthouder?
a big copyrighthouder / the big copyrighthoudereen grote copyrighthouder, de grote copyrighthouder