Potential sources could include academic papers on ISIS propaganda, reports from counter-terrorism agencies, and analyses from think tanks specializing in online terrorism. I might also need to reference specific events where this nasheed was used, if applicable.
Wait, are there any other groups that use similar naming conventions for nasheeds? Maybe other Salafist or jihadist groups. But the name "Dawlat al-Islam" is pretty specific to ISIS. So, it's safe to assume the link is related to them. dawlat al islam qamat nasheed link
Another angle is looking into the production quality. How is the music structured? What instruments are used, if any? Traditional nasheeds are usually a cappella, but some extremist groups might incorporate other elements. Also, the language—could it be in Arabic, or another language? The performance by individuals or a group? Potential sources could include academic papers on ISIS
Also, consider the historical context: when was this nasheed released? ISIS has used various forms of media over the years, including nasheeds, videos, and social media. The timeline might affect the context of the nasheed's production and message. Maybe other Salafist or jihadist groups