The YouTube upload screen was locked yesterday. Had to wait 24 hours for the screen to get unlocked.
Time to make a decision. The next screen has 4 options: Erase song, Replace song, Trim out segment or Dispute claim.
Of course the last option Dispute claim would be the most logical. After submitting a dispute, the outcome is not automatic. There is still a chance it would be rejected. Based on my experience, once the claim is accepted, you can upload a similar video later and won't get flagger again.
The next screen asks you to pick 1 of 4 reasons: Original content, License, Copyright exception such as fair use & Public domain. When performing a piece of Classical music at least 100 years old, have to assume "Public domain" would be the most logical pick and type in your reason.
The disputed "song" does have a BWV #. Anybody who plays or listens to music would know the piece was composed by Bach so at least 300 years old. Guess AI's algorithm doesn't pick up music by Bach, Mozart or Beethoven. It compares sound recordings for anything similar.

