{"algorithm":"Ed25519","canonicalization":"JSON con chiavi ordinate (sort_keys), separatori compatti (',' ':'), ensure_ascii","payload":{"verdict_id":390,"claim_id":403,"claim_text":"Production fell 75% over the last 25 years.","label":"vero","confidence":0.85,"explanation":"North Sea is a mature basin in long-term decline. Based on NSTA production data, oil output fell by about 75% and gas by about 74% between 2000 and 2025 (roughly the last 25 years), with total production down from ~4.4m boe/d in 2000 to ~1m boe/d.","sources":[{"url":"https://www.carbonbrief.org/factcheck-nine-false-or-misleading-myths-about-north-sea-oil-and-gas/","ente":"North Sea Transition Authority (via Carbon Brief)","titolo":"Factcheck: Nine false or misleading myths about North Sea oil and gas","estratto":"Oil output fell by 75% between 2000 and 2025, while gas production fell by 74%."}],"issued_at":"2026-07-01T07:58:27+00:00"},"signature_b64":"ftKnF0DWTsbt/2FLtBEsbKPOdTSzqTDmlVebvUdYHFT6RVDXv+ldsFkgvZYK9ZXx5kD633GjPsP+fC9yldn5Ag==","public_key_hex":"1719e2638a2cc0ec8d552d71dca52197f934e0a66b17e6364f1eed7a1d428e01","note":"Verifica offline: ed25519_verify(public_key, base64decode(signature_b64), canonical_json(payload))."}