Updating your artist pic & bio is done through Spotify for Artists. Get instant access to Spotify for Artists.
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.
Deezer, Napster & TIDAL
To manage your Google Play artist page, sign up at Google Play Artist Hub.
Sign up for Shazam for Artists.
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!