How to use licenses?

How to use licenses?

I was wondering is there a guide on how to use them? For example I downloaded a bunch of music from 'Bart' and noticed he had different licenses for different songs... so for "CC-BY-SA 3.0" I did the following:

Link to license notice: http://creativecommons.org/licenses/by/3.0/

By Bart of 'http://opengameart.org/' Copyright Bart

Disclaimer: The following assets were used under the CC-BY-SA 3.0 License

 

Shady Dealings: http://opengameart.org/content/shady-dealings

Hold the Line (BOSS THEME): http://opengameart.org/content/hold-line-boss-theme

 

Link to Materials:

http://opengameart.org/ under username Bart

I was wondering if something like this would fly for credit so I don't get in trouble in the future? Trying to download what I want to use on the site and make sure I have things set up in text documents so I know who to give credit to for future games that I make.