I am doing a logo for a client who wants to know where the music comes from on the AE animation template and how many companies might already be using it.
Is there any way to find this out?
No way to tell how many people are using it.
Some template sites let you see how many people purchased the same template, but there is no telling how many companies or YouTube channels they've used it for. And there's no telling how many people are using it illegally as well.
If they want it to be unique, there are a number of websites where you can commission musicians to produce a custom piece.