Could you please clarify the distinction between QR code and QRL for me? As I understand, QR code is a type of barcode that can be read by smartphones and is often used for quick and easy transactions or sharing of information. On the other hand, QRL stands for Quantum Resistant Ledger, which is a blockchain platform that aims to provide secure and tamper-proof transactions through the use of quantum-resistant cryptography. Am I on the right track, or is there more to the difference between these two terms?