Songs from popular artists have begun to disappear from YouTube as the platform’s deal with the performing rights organization SESAC (Society of European Stage Authors and Composers) approaches its expiration date.

But just because an artist has ties to SESAC, it doesn't mean every song they've ever released is being blocked, however. A quick test on YouTube shows Bob Dylan's "The Times They Are A-Changin" is blocked due to SESAC, but other songs, like "Must Be Santa," are not blocked.