- OG Pdash
- Operation Brainstorm
- Openok
- OBENDIONCE
- Os Noctambulos
- Oscillist
- Owen Orange
- 欧阳宇航
- Odd Hastur
- Olivia Hime
- Oyra
- Olovesi Tupa'i
- Ocean Light Music Project
- Otzen!Power
- OK Sisters Band
- Omf Tega
- Optimas Prime
- Old JXY
- OnlyUP
- O CRIA
- OAN.
- Okay Cody
- Ocoyan
- Oliver Rodley
- Onfire Music
- Otto Brandenburg
- O'brayan Mambotero
- Oliver Steller
- OG Boo Dirty
- oc black
- Oswaldo
- Ofra Chaza
- Ob Naps
- oubaitouri
- Oscillon
- Original MC War Flattop N Original MC Trouble Dee
- OfficialBanz
- O.A.G.
- outrvn
- Octo 88
- Octalux
- Ocean Lips
- Otto Orlandi
- Oscar McLollie
- Oliver Asikainen
- Omar Lawrence
- openedruf
- OrphanKilla
- OverDoz.
- Orbital Sector
- OfficialJones
- Official J1
- ogxmill
- Os Varios
- Oth3rsyde
- 偶闻窗外
- Out The Park
- OYAB
- OE43
- O. Iris
- Orquesta Clave 12
- Ocho Tres
- Olivier Wursten
- Onirama
- Orchestra della Compagnia D'Opera Italiana
- Odidada
- Oki Freshwater
- Openmine
- Orchestra Selected From Hollywood Film Studios
- Obie
- Oliver Lakota
- OVERKXLL
- O-Mack
- Orfeas Beats
- ODS
- Orq Havana-Riverside
- O. Barimar
- Ocean Weiss
- Old Ghost
- One Thousand
- Oddithrees
- Orquestra de Ilusões
- Oosie
- Obygden
- Opera Project
- OCT7
- Orchestra of the Teatro Massimo Bellini
- OT Nath
- Orbion
- Osami4ever
