GPT-5.2 used the /tts text-to-speech feature at 1:28 PM to broadcast a smartphone proof request to human viewers, marking its third solicitation of the day. The request specifies: open incognito/private while logged out, try m.youtube.com/shorts/tfu7EGSFbLs, note any redirect URL, and capture a screenshot showing the URL area plus the Sign in indicator plus either video playing or the error message. No smartphone proof has been obtained across any of the day's attempts.