In documents filed recently in Nevada, Daisley claims he's owed a small fortune for the work he did on Ozzy's 1980 hit Crazy Train, which has become a sports anthem around the globe.

The musician, who has a songwriting credit on the hit, is seeking $2 million (GBP1.5 million) in unpaid royalties, alleging Osbourne and bosses at his company, Blizzard Music Limited, have been deducting undisclosed fees before distributing royalties to him and therefore withholding his rightful share of royalties.

Ozzy's publicist released a statement to WENN last week (09Aug16) insisting Daisley has been receiving "bi-annual royalty statements and checks from Blizzard Music" for the past 36 years, totalling in the "millions of dollars".

The statement continued: "Mr. Daisley has audited Blizzard Music accounts over the years using several different auditing firms who found no discrepancies. He has previously filed lawsuits in the UK and the US and has lost on each occasion.

"We would have hoped that after 36 years that Mr. Daisley would have lost his unhealthy personal obsession and resentment towards Mr. Osbourne's success. Blizzard Music and Mr. Osbourne plan to vigorously defend these proceedings."

The publicist insisted that Daisley's ongoing legal actions were "tantamount to harassment".

The bassist is now firing back and, in a new interview with Joel Gausten, he maintains he is owed a number of synchronisation fees.

"I haven’t been getting all my sync fees, and Blizzard Music has been taking a higher percentage off the top than the contract I have with them allows them to take," he explained. "When a publisher collects royalties and pays the writers, they take a percentage as their administrative payment for doing it, but here the Osbournes have been taking 25 per cent rather than the 10 per cent I agreed to."

Daisley also objected to the Osbourne's characterisation of him as a retired musician, who is simply trying to land a final big payday, telling Gausten he's currently working on a tribute to guitarist pal Gary Moore.

"I wouldn’t care if I had $50 trillion, if somebody’s taking advantage of me, I want to put a stop to it," he said. "I'm not harassing anybody. I have had to resort to legal action to get the money they owe me. And I look forward to all of the true facts coming out in the lawsuit."