There is one problem. The URL looks good now, but the wrong page gets returned. Instead of the artists page, the home page gets returned.
Well, i assume it doesn't work because i have used the UID/URIs in the templates.
<?php foreach(page('artists/own-artists')->children()->visible()->sortBy('surname', 'asc') as $artist): ?>
<?php endforeach ?>
Maybe i better use the .htaccess to hide/redirect?