Hi, MoosBeat
The certification is an important proof of whether your work can be put online normally. If you only upload one track of the MIDI or the recording file of a single musical instrument, it will usually not pass the review, because the reviewer can get too little information, which cannot be used as complete proof of your item. If your music is sold, but the certifications are not convincing, it may cause the customer to question and the related copyright dispute.
Therefore, we suggest providing more tracks of MIDI or recorded files, so as to facilitate the review personnel to review, but also to avoid causing customers to question your item.
Your certification file will be safely saved in the database without the risk of disclosure. If there are copyright related disputes later, this can be used as an important basis for the legitimacy of your item.
Thank you for your understanding.