{"algorithm":"Ed25519","canonicalization":"JSON con chiavi ordinate (sort_keys), separatori compatti (',' ':'), ensure_ascii","payload":{"verdict_id":396,"claim_id":409,"claim_text":"70 years on from the 1956 Clean Air Act, will the Deputy Prime Minister now support a much needed update of this essential law.","label":"vero","confidence":0.9,"explanation":"The Clean Air Act 1956 was passed in response to the 1952 Great Smog of London. Measured from 2026, that is 70 years — the arithmetic and the date of the Act are correct.","sources":[{"url":"https://en.wikipedia.org/wiki/Clean_Air_Act_1956","ente":"UK Parliament","titolo":"Clean Air Act 1956","estratto":"The Clean Air Act 1956 was an Act of the Parliament of the United Kingdom."}],"issued_at":"2026-07-01T07:58:27+00:00"},"signature_b64":"9yNcZgmX//yfntGA7C1eP6FGxw3LUO9sX4HnXPGhrqJv2hfU87vqPtlrJoO3DXBX95O+aZuH6DqYvLjOkhnpAw==","public_key_hex":"1719e2638a2cc0ec8d552d71dca52197f934e0a66b17e6364f1eed7a1d428e01","note":"Verifica offline: ed25519_verify(public_key, base64decode(signature_b64), canonical_json(payload))."}