This report was prepared as part of Jisc’s work in response to Prof. Adam Tickell’s recommendation “Jisc to lead on selecting and promoting a range of unique identifiers, including ORCID, in collaboration with sector leaders with relevant partner organisations. Funders of research to consider mandating the use of an agreed range of unique identifiers as a condition of grant.” Prof. Tickell’s recommendations drew on work conducted under the auspices of Universities UK to support an efficient, sustainable transition to open access. As a result, this report emphasises those persistent identifiers most applicable to open access to research publications. These identifiers will have applications more widely. Increasing their usage and adoption in the service of open access should bring benefits to many of these applications also, fostering a stronger, more open and efficient research information ecosystem.