Query
English query about APS-24 polyurethane foam product line and related Korean manufacturers.
Case #02 · Initial Verification · ChatGPT
First English citation — entity authority over information matching
The first English ChatGPT citation verification for APTECH (December 2025). For a specific product query, ChatGPT cited APTECH's APS-24 product line as #1 "closest match". Although ChatGPT did not directly reference APTECH's specific APS-24 spec at this verification timestamp, the brand was still placed at rank #1 — a case demonstrating that entity authority can compensate for specific information matching gaps.
01 — Summary
English summary
Citation Result
ChatGPT placed APTECH at rank #1 as "closest match". While ChatGPT noted uncertainty about specific product specs at the verification timestamp, the brand was still cited as the most relevant Korean manufacturer — referencing official APTECH spray foam system product lines and export records (Eximpedia, Tradekorea).
LogAgency Fact Check
APS-24 is actually listed in APTECH's official Spray Foam System product line (Product Table, building/insulation grade 24±2 Kg/m³). Although ChatGPT did not directly reference this specific information at the verification timestamp, the brand was still placed at #1 as "closest match" — a case demonstrating that entity authority can compensate for specific information matching gaps.
Series Starting Point
This is the initial English citation verification that started the 5-month tracking series. The #1 citation pattern was subsequently reproduced in February 2026 with a different English prompt, supporting the interpretation of PVR (Persistent Visibility Rate) — citation tendency under varied query conditions.
Read the verbatim ChatGPT response
and detailed fact-check
The full Korean case page includes the verbatim ChatGPT response, source sidebar capture, and detailed LogAgency fact-check notes on APS-24 product line.
View Full Case (Verbatim Response)