Usually this is not done on the the YouTube end but rather on the end of where you bought the content. I don't personally use the content packs that Magix licenses and sells, but the sites that I do use I had to submit my channel information with them specifically to be put onto their whitelist of accounts to avoid copyright claims.

In the rare case that my content does get claimed for using that content, I don't even dispute with YouTube anymore. I've found it much faster to just go back to the owners and show them that I have an active license and it usually reverses the claim within a couple hours.