{"id": "card_v_50597b7a3831", "kind": "verified", "title": "Luhn(4532 0151 1283 0366) is valid · ISBN-13 978-0-306-40615-7 is valid", "body": "Verdict: HOLDS.\n• doc_validation.luhn: Luhn '4532015112830366' valid=True (matches claim)\n• doc_validation.isbn13: ISBN-13 '9780306406157' valid=True (matches claim)\nSealed and independently re-checkable: https://narrowhighway.com/s/c7afd6622e881c44def4bb5327d8928d81bba9c5199dcfa0f2ee5b6f728b9992", "source": {"label": "Verified by the engine — document_validation", "url": "https://narrowhighway.com/s/c7afd6622e881c44def4bb5327d8928d81bba9c5199dcfa0f2ee5b6f728b9992", "ref": "", "domain": "document_validation", "authority_tier": "engine"}, "shelf": "document_validation", "box": "verified", "bands": ["verified", "document_validation", "HOLDS"], "connections": [{"to_card_id": "card_k_spine_created_order", "relationship": "part_of", "evidence": "a verified seed of the created order (document_validation)"}, {"to_card_id": "card_works_luhn", "relationship": "demonstrates", "evidence": "A worked demonstration in the same field (document_validation)."}], "author": "engine", "created_at": 1784892568.1338148, "updated_at": 1784892568.133815, "visibility": "public", "lifecycle_stage": "public", "volatility": "durable", "surface": "secular", "generated": false, "presentation": {"glyph": "•", "kind_label": "verified", "by": "Verified by the engine — document_validation", "authority": "engine", "posted": "1 month ago", "standing": "", "link": {"url": "https://narrowhighway.com/s/c7afd6622e881c44def4bb5327d8928d81bba9c5199dcfa0f2ee5b6f728b9992", "host": "narrowhighway.com", "provider": "", "titled": "Luhn(4532 0151 1283 0366) is valid · ISBN-13 978-0-306-40615-7 is valid", "waybill_line": "", "reach": "", "embed": ""}}, "neighbors": [{"id": "card_k_spine_created_order", "title": "The created order — the science of the floor", "relationship": "part of", "why": "a verified seed of the created order (document_validation)", "href": "/card/card_k_spine_created_order", "resolved": true}, {"id": "card_works_luhn", "title": "The check digit that catches a mistyped number", "relationship": "demonstrates", "why": "A worked demonstration in the same field (document_validation).", "href": "/card/card_works_luhn", "resolved": true}]}