From the zdnet article linked in another comment:

tech is one thing; business is another. That’s where the RSL Collective comes in. Modeled on music’s ASCAP and BMI, the nonprofit is essentially a rights-management clearinghouse for publishers and creators. Join for free, pool your rights, and let the Collective negotiate with AI companies to ensure you’re compensated.

I guess this is the body that will be leading the enforcement/bringing the consequences