Ozzy Osbourne's death certificate reveals his three unusual jobs

Several unexpected details have come to light after Ozzy Osbourne's death certificate was released to the public this week.

As well as revealing the cause of the Black Sabbath musician's death, the documentation also shed light on some side hustles Osbourne boasted behind the scenes.

For those out of the loop, the British rocker died 'surrounded by love' on 26 July at age 76, according to a statement subsequently released by his family.

His death announcement read: "It's with more sadness than mere words can convey that we have to report that our beloved Ozzy Osbourne has passed away this morning.

"He was with his family and surrounded by love."

Osbourne had three different professions listed on his death certificate (Dia Dipasupil/Getty Images for The Rock and Roll Hall of Fame)

The father-of-six - who was previously diagnosed with Parkinson's disease - was laid to rest last week following a procession through his hometown of Birmingham, which was attended by his wife and music producer, Sharon Osbourne, and their three children, Aimee, Kelly and Jack.

And this week, Osbourne's cause of death was released - along with a peculiar description of the star's profession, which is apparently three-fold.

According to Page Six, the Grammy-winning hit-maker is described in the official records as a 'son'writer, performer and rock legend'.

I know, quite the resumé.

The documentation - also obtained by The Sun - goes on to detail the causes of Osbourne's passing.

As reported by several other news outlets, the star's death certificate lists both 'acute myocardial infarction' and 'out of hospital cardiac arrest' as contributing factors to his passing.

The rocker died aged 76 (Koh Hasebe/Shinko Music/Getty Images)

For reference, the former condition is also known as a heart attack, which occurs when blood flow to the heart is suddenly blocked.

Both coronary artery disease and Parkinson's disease with autonomic dysfunction were also listed as 'joint causes'.

Just days prior to his shock passing, the rock n' roll star is understood to have donated £140million to charities associated with Parkinson's disease.

On 5 July, he hosted a gig in Birmingham with his former bandmates, the profits of which were subsequently split between Birmingham Children's Hospital, Acorns Children's Hospice, and Cure Parkinson's.

"It’s good to be on this f**king stage. You have no idea. I f**king love you all. Let me see your hands in the air. You are the best, each and every one of you. God bless you all," he said.

"I don’t know what to say, man. You have no idea how I feel - thank you from the bottom of my heart."