No, the medRxiv preprint is linked at the bottom of the page. It is freely accessible.

Edit: I guess it depends on interpretation, the press release does start with "The study, available to clinically eligible Biograph Black tier members," which makes no sense to me. Maybe they mean enrolling as a patient in the study was only available to paying members? This would fit with the study population description in the preprint.

That or OpenAI needs to turn back on their highly persistent model and we ask it about coronary inflammation.