Prince is playing a show in Baltimore this Sunday, hoping "to be a catalyst for pause and reflection following the outpouring of violence" in cities around the US. The purple one has also written a new song, a combination tribute and protest ballad penned in response to the death of 25-year-old Freddie Gray. A 60-minute live stream of the music will be available on Tidal, even for people who aren't signed up for the service.

Tidal has been trying to differentiate itself from rival streaming offerings by aligning with artists. It is co-owned by Jay Z, Beyoncé, Kanye West, and a number of other mega-stars. It has offered exclusive music from many of its big-name backers, and is also focusing on access to live music. So far it has put on concerts with J. Cole and Jack White, both streamed on Tidal, and is planning a Jay Z concert as well. Prince isn't part of Tidal's artist / owner group, but he is certainly a performer with a history of battling against record labels.

"I am honored to join Prince in his mission to inspire through the uniting power of music and be able to offer a platform where this moment can be shared globally. We invite all to experience the music and contribute in their own way to promote peace, tolerance and understanding," said Jay Z. "Our prayers go out to Freddie Gray's family and every family affected by brutality and senseless violence." Along with the free broadcast, Tidal’s homepage will also feature a "match funds" donation button to support local Baltimore youth charities.