Ozzy Osbourne's cause of death has been revealed.

The Black Sabbath rocker died at age 76 from a heart attack, according to his death certificate obtained by The New York Times and The Sun.

The death certificate reportedly listed Osbourne's cause of death as "out of hospital cardiac arrest," "acute myocardial infarction," and "coronary artery disease and Parkinson's disease with autonomic dysfunction." Myocardial infarction is the medical term for a heart attack.

USA TODAY has reached out to representatives for Osbourne and the General Register Office.

The rock star died on July 22, just weeks after performing his farewell show with Black Sabbath, his family previously confirmed in a statement to USA TODAY.