Music considerations

I selected certain pieces of music I like for both our title sequence as well as our short montage scene:

Title sequence: This,
this,
this,

Short montage:  This

Our music needs to be free of copyrights so we can use them in our film. For example for one of these songs to be used in our film we need to give the creator full credit at the end as well as emailing them to ask for permission. It should be easier to get music for our film as it's for educational purposes, as well as this our film is non-profit so we don't have to worry about the creator wanting pay.