Spotify
Updating your artist pic & bio is done through Spotify for Artists. Get instant access to Spotify for Artists.
iTunes/Apple Music
You can edit your artist image directly via Apple Music for Artists. If you're not already registered, sign up for Apple Music for Artists through Apple directly: https://artists.apple.com. When asked for contact info, you can use your own.
YouTube Music
To manage your profile on YouTube Music, claim your Official Artist Channel through DistroKid by following these steps.
Amazon
To update your profile on Amazon, claim your artist name on Amazon Music for Artists by following these steps.
Musixmatch
Get verified and update your profile on Musixmatch by following these steps.
Pandora
Pandora offers a similar service which you can sign up for via https://amp.pandora.com/
Deezer, Napster & TIDAL
Email us please!
Shazam
See your Shazam statistics in Apple Music for Artists!
Other Services
You may need to reach out to stores individually or check their FAQ. There's a company called AllMusic Guide that manages a database of music releases. They provide bio and review information to stores including iTunes, Spotify, and other outlets. So try them.
Hope this is helpful!