- Implement server fingerprinting for license binding
- Add code integrity verification with SHA256 hashes
- Implement domain binding for license validation
- Add time-based re-validation with 1-hour caching
- Create secure_verification_required decorator with multiple security layers
- Update both Patreon and PayPal premium plugins with security enhancements
- Add PayPal verification endpoint (verify-paypal-payment.php)
- Update Patreon endpoint to support server fingerprint and domain binding
