And there's no denying that family – a major theme in country music – is a massive part of who she has become. She has learned that when you are talking about family in connection with country music, it's not just who you are related to but often the subject of your songs.
"It's not just context but it is also content," Cash says.
As for whether she thinks of herself as country music royalty considering how much impact her family had on the art form, Rosanne Cash is quick to dismiss such talk as being very dangerous. She prefers to think of herself as part of a strong tradition.
Being part of the documentary didn't reveal anything to Rosanne Cash that she didn't already know about her family. It did end up being a very special project for her.
"The gift they gave me was one of being humbled by seeing my dad's destiny apart from being his child and what influenced him and the traditions that we came from and the honor. I feel so tremendously honored that the respect my family was given in this film, and I feel proud of it," Rosanne Cash says. "In my early career, I spent so much time trying to wrest myself from out of my dad's shadow, and I probably pushed away longer than was gracious, not from him personally, but from my own legacy and the own tradition I came from.
"Luckily, I got wise about that and accepted it. But this has given me another level of being empowered about my own tradition and now seeing my son making a record."
That tradition is a major part of the documentary that was eight years in the making. It includes more than 101 interviews, including with 40 members of the Country Music Hall of Fame. There are more than 3,300 photographs and more than two hours of archival footage used in the production including never-before-seen photos and footage of Johnny Cash.
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