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</div> </header> <div id="content" class="site-content"> <div class="ast-container"> <div id="primary" class="content-area primary"> <main id="main" class="site-main"> <article class="post-42 page type-page status-publish ast-article-single" id="post-42" itemtype="https://schema.org/CreativeWork" itemscope="itemscope"> <header class="entry-header ast-no-title ast-header-without-markup"> </header>  <div class="entry-content clear" itemprop="text"> <div class="fl-builder-content fl-builder-content-42 fl-builder-content-primary fl-builder-global-templates-locked" data-post-id="42"><div class="fl-row fl-row-full-width fl-row-bg-photo fl-node-qg1jc43wbp9a fl-row-custom-height fl-row-align-center" data-node="qg1jc43wbp9a"> <div class="fl-row-content-wrap"> <div class="fl-row-content fl-row-fixed-width fl-node-content"> <div class="fl-col-group fl-node-72tk01w5dprs" data-node="72tk01w5dprs"> <div class="fl-col fl-node-nr6mq2sbzjuk fl-col-bg-color" data-node="nr6mq2sbzjuk"> <div class="fl-col-content fl-node-content"><div class="fl-module fl-module-heading fl-node-vgiwd3aoezsp" data-node="vgiwd3aoezsp"> <div class="fl-module-content fl-node-content"> <h2 class="fl-heading"> <span class="fl-heading-text">How CLOCKSS Works</span> </h2> </div> </div> <div class="fl-module fl-module-heading fl-node-639106c903a10" data-node="639106c903a10"> <div class="fl-module-content fl-node-content"> <h2 class="fl-heading"> <span class="fl-heading-text">How we preserve the hard work and knowledge of scholars</span> </h2> </div> </div> </div> </div> </div> </div> </div> </div> <div class="fl-row fl-row-fixed-width fl-row-bg-none fl-node-5b7346da5aaab fl-row-default-height fl-row-align-center" data-node="5b7346da5aaab"> <div class="fl-row-content-wrap"> <div class="fl-row-content fl-row-fixed-width fl-node-content"> <div class="fl-col-group fl-node-5b7346da5d1bd" data-node="5b7346da5d1bd"> <div class="fl-col fl-node-5b7346da5d38a fl-col-bg-color fl-col-has-cols" data-node="5b7346da5d38a"> <div class="fl-col-content fl-node-content"> <div class="fl-col-group fl-node-639106e22205d fl-col-group-nested" data-node="639106e22205d"> <div class="fl-col fl-node-639106e2221ed fl-col-bg-color" data-node="639106e2221ed"> <div class="fl-col-content fl-node-content"><div class="fl-module fl-module-rich-text fl-node-639106f6df448" data-node="639106f6df448"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h4><strong>As libraries and publishers around the world migrate from print to online-only publications, they need assurance that their investments are protected and preserved for generations to come. CLOCKSS exists to provide these assurances.</strong></h4> <p>As a digital archive, CLOCKSS preserves a online scholarly content. This unique service enables authors, libraries, and publishers to be confident that the content they produce and steward will withstand potential technological, economic, environmental, and political disruptions. Your contributions to the scholarly record will always be available to those who want to access it, after a trigger event has occurred.</p> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-13awp6bh0tfm" data-node="13awp6bh0tfm"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <div class="fl-row fl-row-full-width fl-row-bg-none fl-node-l5dhi0g3m7jy fl-row-default-height fl-row-align-center" data-node="l5dhi0g3m7jy"> <div class="fl-row-content-wrap"> <div class="fl-row-content fl-row-fixed-width fl-node-content"> <div class="fl-col-group fl-node-s15p8hd9bgfq" data-node="s15p8hd9bgfq"> <div class="fl-col fl-node-nkwzg8v3yic2 fl-col-bg-color fl-col-has-cols" data-node="nkwzg8v3yic2"> <div class="fl-col-content fl-node-content"> <div class="fl-col-group fl-node-nioaped3zlys fl-col-group-nested" data-node="nioaped3zlys"> <div class="fl-col fl-node-9ebgsw4u2lfh fl-col-bg-color" data-node="9ebgsw4u2lfh"> <div class="fl-col-content fl-node-content"><div class="fl-module fl-module-rich-text fl-node-7fdpkzcnob68" data-node="7fdpkzcnob68"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h4><strong>World Leading Digital Archive Technology</strong></h4> <p>Built with proven LOCKSS open-source technology, CLOCKSS preserves scholarly publications in original formats. The polling-and-repair mechanism ensures the long-term validity of the data. Content is migrated to the latest formats when triggered in order to remain usable.</p> <ul> <li>The LOCKSS technology safeguards against the long-term, well-documented causes of digital loss: human error, computer attacks, economic and organizational failure.</li> <li>Mirror repository sites at 12 major academic institutions around the world guarantee long-term preservation and access. Our approach is resilient to threats from potential technological, economic, environmental, and political challenges.</li> <li>CLOCKSS assigns Creative Commons Open Access licenses to all triggered publications to ensure they are always open and available to everyone.</li> </ul> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <div class="fl-row fl-row-fixed-width fl-row-bg-none fl-node-l1mxgpd8jnvc fl-row-default-height fl-row-align-center" data-node="l1mxgpd8jnvc"> <div class="fl-row-content-wrap"> <div class="fl-row-content fl-row-fixed-width fl-node-content"> <div class="fl-col-group fl-node-hkpaqw23t95e" data-node="hkpaqw23t95e"> <div class="fl-col fl-node-2wrov13i8670 fl-col-bg-color fl-col-has-cols" data-node="2wrov13i8670"> <div class="fl-col-content fl-node-content"> <div class="fl-col-group fl-node-5f2tvu1er3x6 fl-col-group-nested" data-node="5f2tvu1er3x6"> <div class="fl-col fl-node-5wb4fz7mtyax fl-col-bg-color" data-node="5wb4fz7mtyax"> <div class="fl-col-content fl-node-content"><div class="fl-module fl-module-rich-text fl-node-zh3d6vxyt2gf" data-node="zh3d6vxyt2gf"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Technical Overview</strong></h3> <p>The following is a step-by-step overview of how content flows into CLOCKSS and is preserved.</p> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-6cha4ui8sy2k" data-node="6cha4ui8sy2k"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-asr4l38kwx92 fl-animation fl-fancy-flash" data-node="asr4l38kwx92" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3 style="text-align: center;"><strong>Step One</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-mlgrv0nqbc8d" data-node="mlgrv0nqbc8d"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p style="text-align: center;">The publisher signs an agreement that gives CLOCKSS preservation rights in perpetuity and provides content to the CLOCKSS system.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-qzuf7byv5kec" data-node="qzuf7byv5kec"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-png"> <img fetchpriority="high" decoding="async" class="fl-photo-img wp-image-46 size-full" src="https://clockss.org/wp-content/uploads/2018/08/step-1-1.png" alt="step-1-1" itemprop="image" height="233" width="454" title="step-1-1" srcset="https://clockss.org/wp-content/uploads/2018/08/step-1-1.png 454w, https://clockss.org/wp-content/uploads/2018/08/step-1-1-300x154.png 300w" sizes="(max-width: 454px) 100vw, 454px" /> </div> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-4vbf1tznjx35" data-node="4vbf1tznjx35"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p style="text-align: center;">To allow CLOCKSS access to the publisher's content, the publisher either enables CLOCKSS to harvest content from its website or places the content on a designated SFTP site.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-uxq86b1aify9" data-node="uxq86b1aify9"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-jpg"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-3393 size-full" src="https://clockss.org/wp-content/uploads/2024/04/Picture4.jpg" alt="Picture4" itemprop="image" height="233" width="429" title="Picture4" srcset="https://clockss.org/wp-content/uploads/2024/04/Picture4.jpg 429w, https://clockss.org/wp-content/uploads/2024/04/Picture4-300x163.jpg 300w" sizes="(max-width: 429px) 100vw, 429px" /> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-qruwzlf4a9i7" data-node="qruwzlf4a9i7"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-tan01hkvquxo fl-animation fl-fancy-flash" data-node="tan01hkvquxo" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3 style="text-align: center;"><strong>Step Two</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-bug7y6rehqsd" data-node="bug7y6rehqsd"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p style="text-align: center;">Special CLOCKSS servers located at Rice, Indiana, and Stanford Universities ingest the content the publisher makes available. The content is safe and secure from the time it reaches these ingest machines.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-9shp6bwlquka" data-node="9shp6bwlquka"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-jpg"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-3392 size-full" src="https://clockss.org/wp-content/uploads/2024/04/Picture3.jpg" alt="Picture3" itemprop="image" height="354" width="451" title="Picture3" srcset="https://clockss.org/wp-content/uploads/2024/04/Picture3.jpg 451w, https://clockss.org/wp-content/uploads/2024/04/Picture3-300x235.jpg 300w" sizes="(max-width: 451px) 100vw, 451px" /> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-ywf9s87uc6a5" data-node="ywf9s87uc6a5"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-va1qy3hgwd5p fl-animation fl-fancy-flash" data-node="va1qy3hgwd5p" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Step Three</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-4b9up865jad1" data-node="4b9up865jad1"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p>The content in each CLOCKSS ingest server is verified to confirm that each copy of the content is identical to all of the others. This establishes the authoritative version of the content to be preserved.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-lr4f5qdh18x6" data-node="lr4f5qdh18x6"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-png"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-49 size-full" src="https://clockss.org/wp-content/uploads/2018/08/step-3-1.png" alt="step-3-1" itemprop="image" height="267" width="287" title="step-3-1" /> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-61lxjtvyz8pr" data-node="61lxjtvyz8pr"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-ek80n4ci6gyb fl-animation fl-fancy-flash" data-node="ek80n4ci6gyb" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Step Four</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-zs01a6g5t4pf" data-node="zs01a6g5t4pf"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p>After the quality of the content on the ingest machines is validated, it is collected from them by the twelve CLOCKSS nodes. These are long-term preservation machines, performing the main storage and audit functions.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-5zhtqpb1dalf" data-node="5zhtqpb1dalf"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-png"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-50 size-full" src="https://clockss.org/wp-content/uploads/2018/08/step-4-1.png" alt="step-4-1" itemprop="image" height="287" width="500" title="step-4-1" srcset="https://clockss.org/wp-content/uploads/2018/08/step-4-1.png 500w, https://clockss.org/wp-content/uploads/2018/08/step-4-1-300x172.png 300w" sizes="(max-width: 500px) 100vw, 500px" /> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-6dyb5m0wh1ts" data-node="6dyb5m0wh1ts"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-jyse2cnwfaqu fl-animation fl-fancy-flash" data-node="jyse2cnwfaqu" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Step Five</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-rqvcmds9p0xw" data-node="rqvcmds9p0xw"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p>The content is then managed and preserved through a system of audit and repair. The CLOCKSS boxes continually communicate over the internet to audit the content they are preserving. If the content in one CLOCKSS box is damaged or incomplete, that CLOCKSS box will receive repairs of the content based on other CLOCKSS boxes' holdings and/or by referring to the publisher's original content on the ingest servers. This cooperation between the CLOCKSS machines provides unambiguous reassurance that the system is performing its function and that the correct content remains available.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-vqfi1al9g2m3" data-node="vqfi1al9g2m3"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-png"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-51 size-full" src="https://clockss.org/wp-content/uploads/2018/08/step-5-1.png" alt="step-5-1" itemprop="image" height="213" width="500" title="step-5-1" srcset="https://clockss.org/wp-content/uploads/2018/08/step-5-1.png 500w, https://clockss.org/wp-content/uploads/2018/08/step-5-1-300x128.png 300w" sizes="(max-width: 500px) 100vw, 500px" /> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-cfm4zpgj7kxd" data-node="cfm4zpgj7kxd"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-nfgw9uxsq36o fl-animation fl-fancy-flash" data-node="nfgw9uxsq36o" data-animation-delay="0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Step Six</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-31t4hovqdbwp" data-node="31t4hovqdbwp"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p>When a trigger event occurs, and the CLOCKSS Board decides to release content from the archive, three things happen:</p> <p><strong>1 -</strong> Content is migrated to the newest format so that can be accessed and used with current technology.<br /> <strong>2 -</strong> We carry out thorough checks for copyright holders.<br /> <strong>3 -</strong> Content is made publicly available via the web under a Creative Commons license.<br /> <strong>4 -</strong> If registered with CrossRef, the Digital Objective Identifiers, are re-directed to resolve to the publicly available content.</p> </div> </div> </div> <div class="fl-module fl-module-photo fl-node-3jz0vda8bt67" data-node="3jz0vda8bt67"> <div class="fl-module-content fl-node-content"> <div class="fl-photo fl-photo-align-center" itemscope itemtype="https://schema.org/ImageObject"> <div class="fl-photo-content fl-photo-img-png"> <img loading="lazy" decoding="async" class="fl-photo-img wp-image-52 size-full" src="https://clockss.org/wp-content/uploads/2018/08/step-6-1.png" alt="step-6-1" itemprop="image" height="269" width="519" title="step-6-1" srcset="https://clockss.org/wp-content/uploads/2018/08/step-6-1.png 519w, https://clockss.org/wp-content/uploads/2018/08/step-6-1-300x155.png 300w" sizes="(max-width: 519px) 100vw, 519px" /> </div> </div> </div> </div> </div> </div> </div> <div class="fl-module fl-module-separator fl-node-2tvrzxgmucjh" data-node="2tvrzxgmucjh"> <div class="fl-module-content fl-node-content"> <div class="fl-separator"></div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-foj4uhgtpvx0 fl-animation fl-fancy-flash" data-node="foj4uhgtpvx0" data-animation-delay="0.0" data-animation-duration="3"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <h3><strong>Step Seven</strong></h3> </div> </div> </div> <div class="fl-module fl-module-rich-text fl-node-zym9wj35s0td" data-node="zym9wj35s0td"> <div class="fl-module-content fl-node-content"> <div class="fl-rich-text"> <p>The released content is now freely available from CLOCKSS. It is also directly available via Open URLs through Crossref, or either of</p> <p><strong>1 -</strong> Local Library Link-resolvers<br /> <strong>2 -</strong> From <a href="https://clockss.org/triggered-content">CLOCKSS Triggered Contact</a></p> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </article> </main> </div> </div>  </div> <footer class="site-footer" id="colophon" itemtype="https://schema.org/WPFooter" itemscope="itemscope" itemid="#colophon"> <div class="site-above-footer-wrap ast-builder-grid-row-container site-footer-focus-item ast-builder-grid-row-full ast-builder-grid-row-tablet-full ast-builder-grid-row-mobile-full ast-footer-row-stack ast-footer-row-tablet-stack ast-footer-row-mobile-stack" data-section="section-above-footer-builder"> <div class="ast-builder-grid-row-container-inner"> <div class="ast-builder-footer-grid-columns site-above-footer-inner-wrap ast-builder-grid-row"> <div class="site-footer-above-section-1 site-footer-section 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style="text-align: left"><span style="font-size: 10pt"><span style="color: #333399"><strong>Governance</strong></span></span></h4> <ul> <li style="text-align: left"><span style="font-size: 10pt"><a href="https://clockss.org/clockss-privacy-policy/" target="_blank" rel="noopener"><span style="color: #333399">Privacy Policy</span></a></span></li> <li style="text-align: left"><span style="font-size: 10pt"><span style="color: #333399"><a style="color: #333399" href="https://clockss.org/wp-content/uploads/2024/03/DIGITAL-DISTRIBUTED-COMMUNITY-ARCHIVE-ByLaws.pdf" target="_blank" rel="noopener">CLOCKSS By Laws</a></span></span></li> <li style="text-align: left"><span style="font-size: 10pt"><span style="color: #333399"><a style="color: #333399" href="https://clockss.org/wp-content/uploads/2024/03/CLOCKSS-Articles-of-Inc.pdf" target="_blank" rel="noopener">CLOCKSS Articles of Inc</a></span></span></li> <li style="text-align: left"><span style="font-size: 10pt"><span style="color: #333399"><a style="color: #333399" href="https://clockss.org/clockss-conflict-of-interest-policy/" target="_blank" rel="noopener">Conflict of Interest Policy</a></span></span></li> <li style="text-align: left"><span style="font-size: 10pt"><span style="color: #333399"><a style="color: #333399" href="https://clockss.org/state-of-california-registry-of-charities-and-fundraisers/">Charity Registry</a></span></span></li> </ul> </div></div> </div> </div> </div> </div> </div> <div class="site-below-footer-wrap ast-builder-grid-row-container site-footer-focus-item ast-builder-grid-row-full ast-builder-grid-row-tablet-full ast-builder-grid-row-mobile-full ast-footer-row-stack ast-footer-row-tablet-stack ast-footer-row-mobile-stack" data-section="section-below-footer-builder"> <div class="ast-builder-grid-row-container-inner"> <div class="ast-builder-footer-grid-columns site-below-footer-inner-wrap ast-builder-grid-row"> <div class="site-footer-below-section-1 site-footer-section site-footer-section-1"> 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