If you have uploaded a release and need to grab your Artist URI so that you can setup your Artist Page prior to the release date, go here and select "Request Artist or Album URI/URL" from the second dropdown.
Here's how to find your Artist URI if you already have existing releases in stores!
- Visit your Artist Profile on the Spotify desktop app (not the web version)
- Click the three dots ("...")
- Click "Share"
- Click "Copy Spotify URI"
If you're trying to find your Album URI instead, see the article here.
A Spotify URI is a link that you can find in the Share menu of any track, album, or artist page on Spotify. When a user clicks a link that consists of a Spotify URI (rather than an URL/HTTP address), they're taken directly to the Spotify application, without having to go through the web page first.