{"verified":true,"rows":8,"methodology_version":"1.0.0","algorithm":{"hash":"SHA-256","genesis":"0000000000000000000000000000000000000000000000000000000000000000","preimage":"prev_hash + canonical_json(core)","canonical_json":"json.dumps(core, sort_keys=True, separators=(',',':'))","core_fields":["date","captured_at","index_score","status","methodology_version","signals"],"reproduce":"For each row in /api/snapshots, in date order: compute SHA-256(prev_hash + canonical_json(core_fields)). It must equal that row's 'hash', and 'prev_hash' must equal the previous row's 'hash'. Genesis prev_hash is 64 zeros."},"checks":[{"date":"2026-06-21","prev_hash":"0000000000000000","recomputed_hash":"60ff117229a447d3","stored_hash":"60ff117229a447d3","match":true},{"date":"2026-06-22","prev_hash":"60ff117229a447d3","recomputed_hash":"6edd107d2a680df0","stored_hash":"6edd107d2a680df0","match":true},{"date":"2026-06-23","prev_hash":"6edd107d2a680df0","recomputed_hash":"4b6813fc2726e94c","stored_hash":"4b6813fc2726e94c","match":true},{"date":"2026-06-24","prev_hash":"4b6813fc2726e94c","recomputed_hash":"2cd2782effcd32b7","stored_hash":"2cd2782effcd32b7","match":true},{"date":"2026-06-25","prev_hash":"2cd2782effcd32b7","recomputed_hash":"55aa437d4a38a11d","stored_hash":"55aa437d4a38a11d","match":true},{"date":"2026-06-26","prev_hash":"55aa437d4a38a11d","recomputed_hash":"f6dc2100228591f4","stored_hash":"f6dc2100228591f4","match":true},{"date":"2026-06-27","prev_hash":"f6dc2100228591f4","recomputed_hash":"d76023de216fefe9","stored_hash":"d76023de216fefe9","match":true},{"date":"2026-06-28","prev_hash":"d76023de216fefe9","recomputed_hash":"f46de24a792df0fd","stored_hash":"f46de24a792df0fd","match":true}],"note":"Reproduce this yourself from /api/snapshots — no trust required."}