You can submit new releases to the Amazon Music team to be considered for their global lineup and selection. They must be new releases, never released before.
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1. Open the Amazon Music for Artists App or download it to your mobile or computer.
2. Go to the "New Releases" section.
3. Choose a song.
4. Provide release details.
5. Review the pitch and click "Submit".
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More info at https://artists.amazonmusic.com/promotion