A famous Iranian pop musician played a song whose words are the words protesters have posted. The regime arrested him, but the song is heard everywhere.

The article says that copyright threats are being used to try to get the song taken down. The details are not clear in the article, but it seems to involve a false attribution of the song; why that claim is there is not explained.

Technical systems of copyright enforcement are repressive in their own right, and here they are being used to support of more general repression.