Who made the rap song that said kurtis blow run dmc you havnt hear of rap till you heard of me?

The rap song that features the lyrics referencing Kurtis Blow and Run-DMC is "Rapper's Delight" by The Sugarhill Gang. Released in 1979, it is one of the first mainstream hip-hop songs and helped popularize the genre. The lyrics highlight the influence of earlier rap pioneers like Kurtis Blow and Run-DMC.