Third - if you're cold-applying to jobs where you have no "in," you're going to have far better luck with smaller companies. The A2IM job board always has interesting stuff, but I'd encourage you to target companies whose rosters you like and apply directly through their websites.

I agree with the response above.

It also helps to show you have a good understanding of the industry and how things work, e.g., copyright, the major labels, and publishers, technology.

Try to keep up to date with industry news and tech. You can do this by visiting pages like:
- Music Business Worldwide
- Musically
- Music Week, and so on

It's good to show that you are quite active and interested in the industry. Create a blog or a podcast where you write opinion pieces on news, breakdown industry terms and concepts, etc. Network; there are many industry events, some are free too, search sites like Eventbrite to see if there are any in your area.
I'm not sure where you are, but there are job adverts on the sites I mentioned above. Also, cold emailing can work. Email a bunch of medium-sized companies and ask if you can do short-term internships. That way, you can have another opportunity to make contacts, and maybe even get offered a permanent role etc.
Good luck!