Sorry for the misunderstanding. It's the free symbol ( well, canva gave me this ) and the CC symbol. It's free, royalty-free, and you CAN use it for commercial purpose, just CREDIT. Note if you use the Miserere track, you have to credit the Trinity College for this one. ( see description page ) .
On the page of the asset, you just have to click on " More Information " and you will see it's Creative Commons Attribution v4.0 International for this pack. :P
Regards and good luck for your future release.