SO is it CC0 (public domain)?
If yes, you should add the license into metadata for the asset packs:
"Edit asset pack->Metadata->Release Info->License for assets" It will increase the size of audience that will be able to find your art
Viewing post in FrostByte Dev Tutorial Assets comments
Just for your information.
1. "Creative Commons" without any clarification can mean any of CC licenses https://creativecommons.org/about/cclicenses/
2. "Any way" without any clarification (and assumptions that seems obvious to the author but never to user) usually mean public domain (CC0). You chose CC-BY4 in metadata that in general means "use whatever you want but you must give credit". You can read short descriptions of CC licenses in link above
If everything is correct, I congratulate you