Do your research: Make a list of the major labels that align with your genre of music and the type of artist you are. Look for information on their submission guidelines and make sure you follow them closely. It's important to note that many major labels no longer accept unsolicited demos, so you may need to go through a manager or agent to get your demo heard.
Perfect your demo: Before you send your demo, make sure it is the best it can be. This means having a professional mix and mastering, as well as a cohesive selection of tracks that showcase your unique sound and style.
Build your network: Networking is key in the music industry, and it can help you get your demo heard by the right people. Attend music industry events, join online music communities, and collaborate with other artists to build your network and make connections with industry professionals.
Promote yourself: In addition to sending your demo to major labels, make sure you are promoting yourself as an artist. This includes having a strong online presence through social media and a professional website, as well as performing at local shows and festivals.
Be persistent: Don't be discouraged if you don't hear back from a label right away, or if you receive a rejection. It can take time to get noticed in the music industry, so keep working on your craft and promoting yourself. And don't be afraid to follow up with labels if you haven't heard back from them - just be respectful and professional in your communication.
Sending your demo to major labels is a big step in your career as a music producer, but with the right preparation and persistence, you can increase your chances of getting noticed and potentially signing with a major label.