More than 200 unreleased recordings from the soul icon's archive -- including many from his '60s and '70s creative peak -- are on the way.

Fans of Alessia Cara's breakout single "Here," which has reached No. 15 on the Billboard Hot 100, may ­recognize the deep voice that flits through the background of the track. The song, produced by Pop & Oak and co-written with Sebastian Kole, samples Isaac Hayes' 1971 cut "Ike's Rap 2," one of countless ­reimaginings of the late soul icon's body of work.

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