You can transfer your releases to Soundmera without any hassle, see the tutorial below:
Upload your releases and tracks as usual on Soundmera with the same metadata as on your released releases. Be sure to enter an Original Release Date (the first date the release went live in any format) in the form for your back catalog.
Pick a sales release date at least 2 weeks out from upload.
In the 'Album Documentation' field make sure you tell us that you are moving the release to Soundmera. You can also include links to Spotify or other DSPs so we can review smoothly.
After your release date, make sure to double-check your streams have linked between the existing release and the Soundmera release.
You can then request a takedown from your previous distributor.
To prevent a break in sales/playlists, please do not request a takedown from your previous distributor until you’ve confirmed your releases are live on services via Soundmera. Provided you use the same ISRC codes and metadata, you'll retain stream counts and playlist placements.