Joint pre-registration for a descriptive study of OpenAI stored copies and Crawled labels in ChatGPT (system1 and system2), run on two sites (thegeolab.net and datairi.com). This record is the signed final protocol, version 0.4.3, dated 11 October 2026. File: joint-preregistration-v0.4.3-final.pdf, SHA-256 e14a0efde8a190f4168d30d03a5c0d4f71dafa019efa3cbacf0c0e0df9043b6a. Both authors confirmed this exact file in writing on 11 October 2026 before any confirmatory data collection. Two items shown in the file as proposed or pending were confirmed by Irina Saprykina's message of 11 October 2026: her third open round on Monday 19 October 2026 at about 14:10 UTC, and Artur Ferreira's per-page title queries for Test 1.
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