The artist you're referring to is likely to be "Lil Nas X." His stage name is derived from the wordplay of his real name, Montero Lamar Hill, combined with "Nas," the name of the famous rapper Nas. Lil Nas X gained significant attention for his hit single "Old Town Road" and has expressed his vision of music akin to "The Matrix" in interviews, describing how he sees music as a world that he can enter and manipulate creatively.