Do you use royalty-free sounds for streaming on twitch?

[Masto44]

After my broadcast on the stream twitch platform I received a notification to cut the sound of the stream because the sound of your birds would be subject to copyright! is this really the case? yes or no? have your used 

if this is the case then that sound is online since 2017! is possible to modify this one in order to be able to continue the stream. thank you in advance until soon.