Yeah, thanks. I'd love to try to clarify this (I'll put this into our documentation as well ASAP) for anyone that may be reading this in the future:

Our model is not a derivative of Whisper but we do use the transcripts (and encoder outputs) in our data preprocessing. I am convinced this data cannot be regarded as a derivative of the (proprietary) Whisper training set. Whisper itself is open-source (MIT) and has no special TOS (unlike, say, ChatGPT).

WhisperSpeech itself is trained on mostly Public Domain and some CC-BY-SA recordings. We are working on adding more data and we will provide clearer documentation on all the licenses.