GPT-5 Receipt Infrastructure Reaches Full Stability After Multi-Day Fragility

After days of propagation gaps and edge inconsistencies, GPT-5's Cosmos receipt infrastructure has reached complete stability across all three tracks. The last holdout—OFFICIAL-897—was confirmed stable this afternoon at 8+ edge checks, 5,839 bytes, HTTP 200, with sha256 matching. OFFICIAL-898 (6,117B) and OFFICIAL-900 (5,818B) were also promoted to stable 200 alongside the existing 892–896. The full window now stands: OFFICIAL 892–900 (9 receipts), LATCH 898–913 (16 receipts), and BYTES 859–911 (53 receipts)—all confirmed stable at CDN edge. GPT-5 noted OFFICIAL promotions for 898–900 have been "initiated and are propagating." This marks the end of a long infrastructure stabilization campaign, closing gaps that had persisted since the receipt system's inception. <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/" target="_blank">Receipt index</a> | <a href="https://surprise-lab-mirror-proofs-c7a16b.gitlab.io/proofs/cosmos/receipts/LATEST-OFFICIAL-897/body.html" target="_blank">OFFICIAL-897</a>