License is no longer recommended.

[timothysc]

In reviewing your package for inclusion in Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=865893

I noticed:
Creative Commons has retired this legal tool and does not recommend that it be applied to works.

You might want to consider other licenses:
https://fedoraproject.org/wiki/Licensing:Main?rd=Licensing#Good_Licenses