Cooper Medearis, also known as Oolacile, is a Las Vegas, US based label owner, bass music producer, DJ and digital artist. Oolacile creates dubstep, trench, future trench, house and drum & bass. Medearis manages and owns the multigenre label Halcyon. On 24 August 2020, Medearis simultaneously discontinued his solo label Havel Records in favour of launching Halcyon. Medearis is known for his popularisation and championing of the future riddim/trench subgenre, particularly in his work forming and curating Halcyon.