Track | License URL
----------------------------------------------
01 | http://creativecommons.org/licenses/by-nc-sa/2.5/es/
02 | http://creativecommons.org/licenses/by-nc-sa/2.5/es/
03 | http://creativecommons.org/licenses/by-nc-sa/2.5/es/
04 | http://creativecommons.org/licenses/by-nc-sa/2.5/es/
artwork | http://creativecommons.org/licenses/by-nc-sa/2.5/es/