{"head_hash":"sha256:329dbd5ff666a7cecc5d2611d13c5a18ac39f60df9e238644057e5b1173858e3","events":4742,"merkle_root":null,"tree_size":null,"day":"2026-09-11","verified_at":"2026-09-11T23:52:19.188Z","inclusion_proof":"POST /v1/audit/verify with { day, event_hash }"}