We explore trustworthiness from a dual perspective, addressing both the content and the container (source). Through an illustrative example, we analyze the challenges and opportunities in assessing trustworthiness using the Reference Ontology of Trust (ONTrust) as well as the explanatory notion of Ontological Unpacking. The key findings reveal that establishing information trustworthiness necessitates a clear understanding of its underlying ontological commitments, followed by a systematic process of negotiating admissible truth-makers and deliberating on appropriate information proxies for these truth-makers. These results underscore the importance of explicitly defining the ontological assumptions behind information and systematically evaluating the proxies used, ensuring more robust and coordinated decision-making processes.