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
Deezer has a Creator feature, which allows you to edit your artist profile, as well as view your stats on their platform. Detailed instructions on how to claim your Deezer profile can be found here:
https://support.deezer.com/hc/en-gb/articles/360018607978-Claiming-an-artist-profile-on-Deezer
*When asked for your distributors email, feel free to list support@distrokid.com.
Shazam
See your Shazam statistics in Apple Music for Artists!
Other Services
You may need to reach out to streaming services 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 services including iTunes, Spotify, and other outlets. So try them.