"Brandon bravely battled cancer for more than three years," a representative for his family said in a statement.

Brandon Blackstock, the talent manager and former husband of Kelly Clarkson, died of melanoma, a form of skin cancer, on Aug. 7. The Silver Bow County Coroner Dan Hollis tells PEOPLE Blackstock "passed away peacefully at his home in Butte,

Dan Hollis, coroner for Silver Bow County, confirmed the form of skin cancer as Blackstock's cause of death to Entertainment Weekly; the manner of death was listed as natural. Blackstock, who died on Aug. 7 at the age of 48, passed peacefully surrounded by family at his home in Butte, Mont.