Who produced the film "The Blair Witch Project", known for its found footage style?

The Blair Witch Project is notable for its innovative use of the found footage style, which contributed significantly to its popularity and cult status. Haxan Films, the correct producer, was an independent production company formed specifically to create this film. They utilized a unique marketing strategy that played off the film's premise, creating a sense of authenticity and blending reality with fiction, which resonated with audiences and helped propel the film's success.

This choice reflects the film's independent roots, which were crucial to its production and the lower budget that allowed for a more experimental approach. The other options—Universal Pictures, Warner Bros., and Columbia Pictures—are major studios that typically work with larger budgets and more mainstream film projects, making them less aligned with the independent and innovative nature of The Blair Witch Project.