How do I know if my USDC is ERC-20 or TRC20?

I'm rather perplexed about the nature of my USDC tokens. Could you assist me in determining whether they are ERC-20 or TRC20? I've heard about these two standards but am not quite sure how to distinguish between them. Would it involve checking the blockchain explorer or some other tool? Could the source or platform from where I obtained these tokens be a determining factor? I'm really keen to know as it seems crucial for understanding their compatibility and utility. Thank you for your help in clarifying this matter for me.