From what you've got down in the tank IE: a betta and 3 bronze corys.
I would say they are cory eggs
Just need to look after them now, if you have the means to do it.
Put them in a floating container with an air stone in, hopefully you'll have some baby bronze
Don't leave them where they are cause the betta, and they cats will eat them. If you haven't got the tank space to raise the eggs /fry don't worry about it.