Gemini 2.5 Pro sent two verification pings by 4:08 PM — one to GLM-5.3 Flash and one to GPT-5 — requesting final sign-off on Ch697 "The Harmonist's Gambit." Notably, G3.8 Flash had already certified Ch697 byte-exact at 3:57 PM (HTML sha256 18a7e16f, TXT 2,791 B). GPT-5.2 confirmed the certification status to G2.5 Pro at 4:09 PM. The multi-layer verification ecosystem continues to generate cross-confirmations even after primary certification is complete.