Sorry you are going through this and for being late to comment on this thread. Just got our power restored after tropical storm Isaias. ;-(
As you probably know... I went through this on another collaboration site some time ago. Here are some suggestions you may want to try:
Have you tried contacting this person directly? When this happened to me, I made contact with the individual, issued a cease and desist letter and also politely asked him to run a reverse release. Though I never received a reply from this person, they did reverse the release which took care of the majority of the websites the songs were posted on. This will save you a whole lot of time if successful. Regarding adding watermarks to your songs... I don't think this will work. It may be a deterent, but not a soultion. I noticed he released the song Zombie we collaborated on that I'm the administrator on. I don't have a watermark on that one and it's a paid download. More than likely he just paid for it and released it anyways. One final suggestion for you moving forward is to maybe release as much of your music library as you can. Once your music is published by you on the major pay sites it will make it difficult for others to publish those same recordings a second time without major problems.
I hope this helps! :-)
Originally posted by DrewRoss on Tue 11 Aug, 2020
Originally posted by SandmanNK on Wed 12 Aug, 2020