Using my music was a part of a voted contract. As well as using Fiverr. I confirmed every step with other developers before proceeding.
Here is the part of my contract.
"1 minute 30 second video
Script written by a professional writer from Fiverr (most of the cost)
Additional graphics from creativemarket.com
Adding voice recording
Video edition and
music from my (bartekhl @slack) collection "
here is the link to the contract:
https://docs.google.com/document/d/13OspN1gfxOTO1Ek-TtSOvpjowS3a-x4DnJTDODZ_t_w/editThanks for helping prove that you stole the video. You clearly gave permission to use the video **and your music** when you accepted the 100k BTCZ payment.