Confirm you have the rights to the song (ownership or permission to distribute)
Create a Spotify account
Choose a Spotify music distributor (e.g., DistroKid, TuneCore, CD Baby)
Create an account with the distributor
Upload the audio file (commonly WAV/FLAC/MP3 as supported by the distributor)
Add metadata: track title, artist name, featured artists (if any), songwriter credits
Provide release details: album/single name, release date, genre, explicit content flag
Upload artwork (cover art) that meets Spotify requirements (size/format and rights to the image)
Enter ISRC/UPC codes if required (or let the distributor generate/provide them)
Review all details and submit the release
Pay any distributor fees (if applicable)
Wait for the distributor to deliver the release to Spotify
Verify the song appears on Spotify under your artist profile
If needed, request fixes through your distributor (metadata/artwork) before/after release per their policy