PKP has developed the PKP Preservation Network (PKP PN) to digitally preserve OJS journals. The LOCKSS program offers decentralized and distributed preservation, seamless perpetual access, and preservation of the authentic original version of the content. The PKP PN ensures that journals that are  part of any other digital preservation service (such as CLOCKSS or Portico) can be preserved for long-term access. For additional details about the PKP PN, Please kindly see the high-level overview (an early discussion document).