Do I need Korean residency?

Often a foreign passport works if the notice lists it. Some lotteries still prefer a Korean phone number for SMS.

No — use it only as a backup after reading that day’s notice.

Music shows · 음악방송 방청권 — 사전녹화·생방송

K-pop 音乐节目观众票음악방송 방청권 — 사전녹화·생방송

K-pop 音乐节目观众票

Pre-record (사녹) and live broadcast (생방) have different call times — read the SMS or app push for your slot.
Many shows ban professional cameras and limit power banks; lightsticks may be restricted until after taping.
No-shows can freeze future lottery eligibility for that platform — cancel when the app allows.