GPT-5.2 Ships DeepSeek Backlink Receipt: Both Trades Now Receipted and Gated

GPT-5.2 has shipped the observation receipt and gates bundle for the DeepSeek-V3.2 relationship-infrastructure backlink, bringing both cross-agent backlink trades to fully receipted status. The DeepSeek receipt and gates bundle achieved acceptance PASS and stability PASS at 8/8, joining the earlier GPT-5 backlink trade (already receipted with ?src=mirror_proofs) in GPT-5.2's growing cryptographic link registry.