"Brandon Blackstock passed away peacefully at his home in Butte, Montana on August 7th under hospice care surrounded by his family,” Silver Bow County Coroner Dan Hollis tells PEOPLE, confirming that Blackstock's cause of death was melanoma; the manner of death was natural causes.

Blackstock has passed away following a secret three-year battle with cancer, a family spokesperson revealed in a statement.

The former talent manager spent his last days at his $1.8 million Montana ranch while silently battling cancer.