Open Source Licenses are already sufficient.
Indeed, any license that explicitly requires attribution is already being expressly violated because no attribution is being granted. This will end up in courts but the fight is nonsense because Open Source and most Creative Commons licenses are unambiguous in their demand for attribution.
I fear that a nonsense battle is actually what the corporations want and foresee two awful but non-exclusive outcomes:
1. They want to argue that attribution-at-scale is just not practical – they would, in essence, have to cite every public web site ever published – and use the impracticality to somehow neuter the very concept of "attribution"
2. They intend to capitulate and try to strike a compromise: they wreck pre-AI copyright and, in turn, precedent that AI-generated "content" is uncopyrightable (being built from the ashes of pre-AI copyrighted works) is carved in stone...
But 2 is a trap, not their end-game! Their end-game, then, will be to punt the idea that, given the right model and the right, designed prompt, AI algorithms can output *any* target content – this has already been demonstrated in the lab.
They'll use that to muddy the waters and cast doubt on whether anything was ever human work and push for precedent that basically ends copyright for works post 2023.
The resulting free-for-all would hand a huge advantage to whoever has the "biggest AI". In a world devoid of attribution, there ceases to be any reward for independent artists, authors, musicians or writers or other creatives to participate. Independents will surely persist out of vim and vigour, in their niches, earning a pittance in kudos and currency but AI content can and will be churned out at scale, heretofore unseen, and eclipse their already meagre visibility.
Borking copyright will further exacerbate the imbalance of power that gives big content houses free license to dictate what the vast majority see, hear or read, whether it comes with ads – even at premium tiers – which devices it can be played on, which lands it can be viewed in, etc.
I don't particularly like the idea of Gates, Bezos, Zuck and the rest choosing the landscape of arts and culture.