If you want to get in touch with the music copyright agency, you can do so in the following ways:

The first one can use Baidu to search for "music copyright agent" on the Internet. Generally, these companies will have their own official website online, so they can go to official website to find contact information.

The second is to search for "music copyright agent" on Alibaba, which is a huge commercial platform with a lot of commercial information. Generally, these companies will have contact information on them.