They're free licensed...if that's even a word. If I'm completely honest, I don't know much about copyright laws and such and such. I just make music.
i, and i also imagine many others, would feel uncomfortable using a free asset without a license listed, so it'd be nice if you added one. If you want a simple to understand one that allows people to use it freely but requires crediting you, i'd recommend the CC-BY license, you can read more about it here
This is much appreciated as someone who doesn’t really know much about copyright. Thank you! ❤️
If you love making music, I would recommend to start researching more about copyright, not only will it save you hassle in future it will help you grow your possible music career.