Michael Jackson's mother has decided to let the world listen to a brand new unreleased MJ song -- and, taking a shot at Sony, one she claims is 100% authentic.
The song -- "Opis None" -- was pulled from the archives of JacksonSecretVault.com ... a company in which Katherine Jackson is a partner. The company owns nearly 300 unreleased MJ tracks ... along with never-before-seen video and memorabilia.
Howard Mann, Katherine's partner in the company, tells TMZ, "In an effort to overcome the confusion as to the authenticity of the track the estate has recently released we want to give an actual authentic Michael Jackson track to the world ... for free."
Sony released a teaser of an upcoming MJ album, which various experts have authenticated as the real deal.