- O Gois Tou Thiseiou
- Overlight Underdark
- Oskar Baeten
- om la luna
- Ontborg
- Olympius
- October Days
- OhYounger
- ORUM
- ozk
- Observable Phonics
- Orchestre des Champs-Elysées
- OP_SA
- OVER KILL
- Oh Hyeon Jun
- Oh Lawd
- Orpheus Petrola
- Oh No Noh
- OLD×fashion
- Omegatron7
- Olly Sholotan
- 欧阁Vulgar
- Osayuki
- Oli Harper
- Opie
- ov1
- OYBAIQEWAG FM
- Oskar Hill
- Oveit
- OTB ENT.
- Orkiestra Dni Naszych
- 欧阳皇甫
- Ostey679
- Owen Duff
- Orpheum Melody Masters
- Official S8
- Over Heaven
- Ottavia Maria Maceratini
- Oro Chi
- Oscar Vazquez
- OglaYe
- Otterlope
- OhPi
- Oslo Ess
- otro
- Onetype
- Off in the Woods
- Oven Downright
- OPPRESSED DYNASTY
- Orchestra of the Opera di Milano
- Obibini Takyi Jnr
- Olaf Bender
- Official Arri
- OSCAR HOLLAND
- Oran "Juice" Jones
- Orchestra Filarmonica di Torino
- Ohsofly
- Ozu8lack
- Osbay
- Onireex
- OIL-LEN
- Otk Trap
- Orange Master
- Only The Fake!
- Ocean Beach Waves Consort
- Ozya
- Orange Ending
- okmasn
- Osukasambe
- Oques Grasses
- Ole Steinar Nesset
- OP Dewangan
- Oshay
- Over Take
- Onur Ormen
- 欧几里德·优克兰特
- Oliver.Y
- olle ljungström
- Orquesta Todos Estrellas
- Optimystic LMZ
- Oceanvs Orientalis
- Orli One
- ollieto
- Off The Care
- Oseas
- Octave 20
- Ocean Lullabies
- Orkest Jan Gorissen
- Osvaldo Fresedo Y Su Orquesta Típica
- Orhan Koç
