Yes, it is. The Winchester curse is based on the real - life story of the Winchester Mystery House. Sarah Winchester, the owner, believed that she was haunted by the spirits of those killed by Winchester rifles. She continuously built onto her house in a maze - like fashion to confuse the spirits. It has become a famous haunted location.
Yes, it is. The story of Robert the Doll is based on real events. There have been many strange and unexplained occurrences associated with the doll, which has led to the belief in a curse.
I'm not sure specifically which 'the curse true story' you're referring to. There could be many stories with such a title or concept. It might be about a supposed curse in a particular place, like a haunted house where strange things happen that people attribute to a curse.
It's a mix. The fact that people have been exploring Oak Island for a long time and have encountered difficulties is true. But the whole concept of a 'curse' might be a bit of an exaggeration. There are real historical events and archaeological finds on the island, but the curse part might be a way to make the story more interesting and mysterious.
Partly. The show takes inspiration from actual searches on Oak Island, but there's likely some fictionalization to make it more engaging for viewers. The core premise of the mystery is rooted in real history, though.