Track | License URL
----------------------------------------------
01 | http://creativecommons.org/licenses/by/2.0/de/
02 | http://creativecommons.org/licenses/by/2.0/de/
03 | http://creativecommons.org/licenses/by/2.0/de/
04 | http://creativecommons.org/licenses/by/2.0/de/
05 | http://creativecommons.org/licenses/by/2.0/de/
artwork | http://creativecommons.org/licenses/by/2.0/de/