LOS ANGELES, California (CNN) -- "Every frame" of the Michael Jackson you'll see in "This Is It" is "unquestionably and undeniably" the real pop star, not a body double, the documentary's producers said Monday.

Sony Entertainment Pictures reacted to a tabloid report quoting Jackson's father questioning the authenticity of some of the movie's footage, calling the report "pure garbage."

Joe Jackson's quote also clashed with what one of his sons said over the weekend after seeing the film.

"My brother's movie 'This Is It' is truly riveting," Jackie Jackson said. "Michael is electrifying."

The movie is based on about 80 hours of video shot in the three months before Michael Jackson's death on June 25. It captures Jackson's preparations for his London comeback concerts that had been set to begin in July.

"We get a glimpse of a true genius at work," Jackie Jackson said. "His passionate message for healing the world, saving the planet and our children's futures is something he was always striving for in his lifetime."

London's News of the World tabloid published a short story Sunday that suggested members of the Jackson family were skeptical about whether the movie shows Jackson's true physical condition before his death.

"This movie features body doubles, no doubt about it," it quoted Joe Jackson saying. "I think people will tear this movie apart."

The newspaper did not indicate when or where Joe Jackson made the statement.

The personal lawyer for the Jackson family had no comment. The public relations firm normally representing the Jackson family did not immediately respond to a request for comment.

Sony issued this statement Monday:

"This story is pure garbage and there are no body doubles. Audiences will begin to see the film tomorrow and every time they see The King of Pop they will know that every frame is unquestionably and undeniably Michael as he rehearses and prepares for the London concerts that were to have begun this past summer."

Joe Jackson would not directly benefit from the success of the film, since he is not one of the beneficiaries of the estate. Jackson family matriarch Katherine Jackson and the pop star's three children share the estate proceeds with unnamed charities.

The Jackson estate administrators signed a lucrative deal with Sony to make the film.

Images of a healthy and active Jackson could run counter to some charges made by members of the Jackson family that pressure to prepare for the London shows contributed to Jackson's death.

Jackson family lawyer Londell McMillan recently said there is a possibility Jackson's family could file a liability lawsuit against the concert producers.

The Los Angeles County coroner ruled Jackson's death a homicide. A summary of the coroner's report said the anesthetic propofol and the sedative lorazepam were the primary drugs responsible for the singer's death.

Los Angeles police detectives have not concluded their criminal investigation and no one has been charged.

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