Integrated Circuit (IC) supply chain attacks-such as piracy and intellectual property (IP) theft-pose a critical challenge for IC and System-on-Chip (SoC) designers. This paper introduces a novel anti-piracy design technique for Bluetooth Low Energy (BLE) transceivers by adapting SyncLock, an RF transceiver-specific logic locking method originally developed for Wi-Fi, to the BLE hardware architecture. The core idea of SyncLock is to key-control the transmitted frame's preamble, ensuring that an incorrect key prevents synchronization between transmitter and receiver. We demonstrate this approach using a Continuous Phase Modulation (CPM) transmitter configured for BLE. Experimental results confirm that the proposed technique successfully achieves key-based functionality: with the correct key, normal operation is preserved and the locking mechanism remains transparent, whereas an incorrect key prevents communication link establishment. Additionally, the results show that embedding SyncLock incurs minimal and justifiable overhead, highlighting its practicality and making it a strong candidate for protecting Bluetooth transceiver hardware IPs.