FAQ - Usage of the music: Can a Creative Commons license be withdrawn or revoked by the author?
Creative Commons licenses are non-revocable, which means that once a work is licensed under a Creative Commons license, the copyright holder cannot take back the rights they have granted to others. This is because once a work is made available under a Creative Commons license, others have relied on that license and have used the work in accordance with its terms. Revoking the license would not be fair to those who have already used the work in good faith. Additionally, the non-revocable nature of Creative Commons licenses helps to ensure that the work can continue to be used and shared, even if the copyright holder changes their mind about the licensing of the work.