Creative Commons license
All the public files available in LottieFiles are distributed under Creative Commons (CC) Attribution (BY) unless stated otherwise.
Under the license the files available on LottieFiles:
The creator(s) must be attributed in your application. This attribution must be visible to the end user. LottieFiles recommend the attribution be placed along with the link to the original animation where possible
Animation by Chris Gannon on LottieFiles
Chris Gannon on LottieFiles: https://lottiefiles.com/35200-heart-eyes-burst
Chris Gannon @LottieFiles (to be used in instances where a link cannot be placed)
Files from LottieFiles can be shared as long as the creator(s) are credited appropriately.
Modifications to the files are permitted without the consent of the creator(s), but appropriate credit must be given to the original creator(s).
Files can be used for commercial usage within applications
More about Creative Commons (CC) Attribution (BY) here