Absolutely! In fact, you must register songs with all songwriters included. You can add co-writers who are not Songtrust clients in your account under "Outside Writers" at no charge.
In the song registration process, you can indicate which songwriters are co-writers. We will then collect your share of royalties, while the non-Songtrust writers will be responsible for collecting with their publisher. We make sure to collect affiliation information for all writers so that they are credited properly. This video shows you how to register a song.

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