How do you handle redirects? Like if a popular QR code generator and redirector hosting service supported this and signed my QR code, couldn’t I just change th

How do you handle redirects? Like if a popular QR code generator and redirector hosting service supported this and signed my QR code, couldn’t I just change the redirect but the original target URL is still valid? You could try to detect redirects but that could be tricky once JS is involved.