Digital preservation (DP) service can be provided at various levels and by different agents. But the very nature of DP requires that the service be provided in a reliable, resilient, trustworthy, and sustainable way. This further demands a systematic thinking covering the contextual, legal, organizational, technical, administrative, financial, and personnel aspects of the services, and an evidence-based operations approach ensuring the requirements for trustworthiness is understandable, implementable, measurable, verifiable, retraceable, accountable, transparent, and efficiently executable. The auditing is a tool and an opportunity, but the resulting trustworthy service is the starting point and the desired result. The workshop will summarize international understanding, standards, and best practices, but will mainly use the experience of NDPP to illustrate how a real life digital preservation service develops itself in response to the requirements of trustworthiness auditing in regard of those principles. The audience will be asked to discuss their requirements and efforts or plans from their individual needs for digital preservation services.

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