Ozzy Osbourne’s cause of death is now known. The Black Sabbath singer died on July 22 of a heart attack, The New York Times reports, citing a a death certificate that the late Black Sabbath singer’s eldest daughter, Aimee, submitted in London. According to the certificate, Osbourne, who was 76 years old, had also been living with coronary artery disease and Parkinson’s.

Osbourne played his final show, a massive Black Sabbath reunion and farewell, in early July in the singer’s native Birmingham, England. His funeral took place on July 30, and the procession was also a major occasion for his legion of fans.