- OG YARCHI
- Oddly Music
- Obsidian Radio ft Jan Johnston
- Old-G
- Oven Projects
- Obscene Execration
- Orhan Hakalmaz
- OTOSAN
- Olimpiada 80
- Outer Limits
- Orchestra and Chorus of the Uzbek musical theater
- Olivier Louvel
- Orquesta Barroca de Sevilla
- Oulapo
- OG Technique
- Oluis
- Olivier Declovis Bonga
- Ois Williams
- Oliava Downs
- Oddability
- Octave Brand
- Ollie Loudon
- opiumdrift
- Our Ashes Remain
- Olivver
- ORIONBEATS
- Oh - My Lord
- OTT10bang
- Ottavia
- Odiijambo
- Owen Rosendahl
- Octave One presents Never On Sunday
- Options Open
- OgeeYAS
- OTC Glo
- Ospina
- Olecram Jos
- ODN Prince
- Otto 636
- Oliver Wärnelid
- Otto Le Blanc ft Orry Jackson
- O-Side Blaze
- Os Tropikantes
- 欧巴哲翰
- Obe 1 Kanobe
- Ocean Sounds Plus
- OPENsi
- ONAWJO
- Opaque Ghost
- Organización X
- OverbeaTs
- Oscar Marin
- Obint
- Oussama Dous
- Oddfellows
- Oskar Nordbø
- Olaf Sosa
- Ohmme
- ONE PACT
- Outta Peak
- Oscar Hemingway
- Obwigszyh
- Oteezy Bang
- Ohdassant
- OilKick
- Octavio Red
- Oim
- Oldd English
- Olymp.us
- OLD G
- Olly Walker
- Olvin Maame
- Olivia Eldredge
- OSAKAAKIRA
- Oniriclub
- One Take Maverick
- Odin Kaban
- oneofseven
- oenos
- OLLIE SWAY
- omes
- Odee The Sniper
- Opium Underground
- Onno's Huisgenoten
- Onewaygang
- Opport
- Oh Polo
- One Time Mountain
- Odsen
- Ola Bremnes
