I applied for H1B through two employers last year and both got approved. I went on to work with employerX and here are my concerns:

1.How would I know the H1B with employerY has been revoked? Is their any way I can find out the status (please don’t suggest to check with employerY)?

2.Can I use H1B with employer Y to transfer my H1B to employerZ (I don’t have any pay stubs from employerY, but have from employerX)?