An official cause of death has been confirmed for Ozzy Osbourne. The legendary Black Sabbath frontman died of a heart attack and also suffered from coronary artery disease and Parkinson’s disease, according to a death certificate filed at a registry in London and obtained by The New York Times.

Ozzy Osbourne's official cause of death has reportedly been revealed two weeks after the rock legend died in Birminghamshire, England on July 22.