[CA] Am I flagged as do-not-hire?

Hi all! I was managed out of my last position as a nurse. My director found trivial/false things to blame me for and I resigned before I could get fired. It's fine, I'm over it (although I do hope he eventually gets caught for the embezzlement I'm pretty darn sure he's committing but that's neither here not there). That position was non-union. It's been a year and a half, I've recovered from the devastation and complete derailment of my career. I'm now applying to positions in a different department at the same hospital network (different city), and these are union positions. I believe the department are also under different sections of the hospital (like "medical foundation" vs "hospital" for example) I was just rejected for a position I kind of thought I was a shoe-in for. Is it possible that the (fucking invalid bullshit) disciplinary write-ups from my last position are visible to hiring teams for the current jobs I'm applying to? I was really hoping the union vs non-union and "foundation" vs "hospital" circumstances would mitigate the possibility. Is there a way to find out if I am listed as a do-not-rehire? Thanks so much for your help!