Mistaken Copyright on Alert Sound
Following - https://help.twitch.tv/s/article/alerts-by-twitch-faq?language=en_US#faqs
"If you believe you received this message in error – for example, because you believe our system mistakenly identified copyrighted audio or you have the rights to upload and include the identified copyrighted audio in your streams and archives – please let us know via UserVoice."
I tried uploading and using a sound which has permission from the owner of the sound to be used.
One file had permission like this - "
Creative Commons 0 You can copy, modify, distribute and perform the sound, even for commercial purposes, all without the need of asking permission to the author."
The other I tried said this - "License: Attribution 4.0 International (CC BY 4.0). You are allowed to use sound effects free of charge and royalty free in your multimedia projects for commercial or non-commercial purposes."
One was from freesound.org and one was from free sounds library
Both were flagged by twitch for copyright.