Prince released the five-song album 'C-Note,' to NPG Music Club members only in March 2004.

"Prince dedicated his life to speaking out against injustice," the estate wrote on Sunday. "In this note that he kept in his personal archives, he wrote a message that still resonates today." U.S.

Along with the note, the estate provided a music video for Prince’s song “Baltimore,” written after the 2015 death of Freddie Gray while in police custody in that city.

Prince originally released the song in 2015 in response to the death of Freddie Gray. Prince's Estate Re-Releases His 'Baltimore' Video With A Handwritten Note Sound+Vision ...