Kanye West's production of each track on Nas' new album, "Nasir," follows through on a promise West made to President Barack Obama in 2016.

"I promised Obama Ima do beats on NAS' next album," West wrote in a now deleted tweet.

West and Nas have a history of collaboration dating back to West's early days as a producer.

"Nasir" debuted at a listening party in New York on Thursday night, and it's expected to arrive on streaming services at some point Friday.

Kanye West's stellar production on Nas' 11th studio album, "Nasir," set to be released Friday, follows through on a promise West made to President Barack Obama in 2016.

"I promised Obama Ima do beats on NAS' next album," West wrote in a March 2016 tweet that has since been deleted.

"Nasir," Nas' first album since 2012's "Life Is Good," debuted at a livestreamed listening party underneath the Queensboro Bridge in Queens, New York, on Thursday night. West and Nas both attended.

West produced each of the album's seven tracks, and he's featured on two songs. One track, tentatively titled "Cops," finds West and Nas trading sharp verses on police brutality over a beat that samples the comedian Richard Pryor and the rapper Slick Rick.

West and Nas have a history of collaboration dating back to West's early days as a producer. West has said he was the uncredited producer of Nas' song "Poppa Was a Playa," which appeared on Nas' compilation album "The Lost Tapes" in 2002. The pair would go on to appear together on several other tracks West produced, including 2005's "We Major" and 2006's "Still Dreaming."

"Nasir" was not immediately available on streaming services Friday following the listening party on Thursday night, but the livestream is still available on Mass Appeal's YouTube page.

Listen to the album below, via Mass Appeal: