As explained on its Facebook page: "DotSong (.SONG), the generic Top-Level Domain (gTLD) Name and Internet/Web Address (TLD) Extension for songs."
A web site is available here: http://www.dot-song.com
A blog about New gTLDs and dotBrands (.BRANDs) from the ICANN new gTLD program. You can subscribe to The gTLD Club's Newsletter.
New gTLD Consultant based in Paris. "New gTLD" stands for "new generic Top-Level Domains" from the ICANN new gTLD program. They are new domain name extensions such as ".consulting" (instead of ".com").