What is CHORUS?

CHORUS is a suite of services and best practices that provide a sustainable solution for agencies and publishers to monitor and deliver open access to published articles reporting on funded research.

This first initiative of the non-profit CHOR, Inc. went live in July 2014 with more than 100 signatories, including not-for-profit and commercial publishers who collectively produce the vast majority of peer-reviewed articles reporting on funded research. CHORUS enables users to easily find and access the articles on the publishers’ sites, along with essential tools, updates, and correction and retraction information. New articles are continuously added and are freely accessible to the public, either immediately on publication or after a designated embargo period.

Built with widely used open technology, CHORUS reduces duplication of effort, minimizes costs, and ensures the continued availability of research literature, delivering value to funders, publishers, researchers, institutions, and the public at each point in the process of enabling open access: identification, discovery, access, preservation, and compliance.

How does CHORUS work?

CHORUS serves as an information bridge, supporting agency search portals and leveraging publishers’ existing infrastructure to facilitate a simple compliance process, optimized search and dashboard services, and multi-party archiving and preservation capabilities.

To initiate CHORUS’ services, authors simply have to identify their funding sources when submitting a paper for publication with a participating publisher. That action tags the article with funder identifiers from Crossref’s Open Funder Registry, triggering open access of the best available version (either the final, published version or the author’s accepted manuscript), either immediately on publication or after a designated embargo period.

The data that results from the tagging is collected by Crossref and provided by CHORUS to all through an open Application Programming Interface (API); this can be used by anyone to create new and customize available search and analytic tools. Applications to optimize search and enable funders to track and ensure compliance and analyze funding impact have already been developed by CHORUS and are available to participating agencies. CHORUS also partners with CLOCKSS and Portico to ensure the archiving and preservation of research papers and continued access in the event of cessation of access from a publisher.

What does this mean for Authors, Funders, Readers, Publishers, and Academic Institutions and Libraries?

Authors: CHORUS helps minimizes the administrative burden for authors associated with compliance with open access requirements. Authors identify their funding source(s) when submitting an article to a participating publication. Through CHORUS, publishers take care of everything else. For a growing number of funders, linking to open access articles on the publisher’s site equals compliance with their plans. For all participating funders, the CHORUS service enables tracking of research output and access through a dashboard and other routine reporting.

Funding Agencies: CHORUS offers funding agencies a streamlined solution to meet the open access requirements put forth by the U.S. Office of Science and Technology Policy in February 2013 as well as a growing number of open access requirements from other funders. No action is required by the funder to showcase research breakthroughs and discoveries by enabling access to the best available versions of papers reporting on their funded research. CHORUS creates customized funding agency portals and search engines, and our dashboard application makes it easy to monitor author and publisher compliance and demonstrate the impact of taxpayer investments.

Readers: CHORUS automates open accessibility of articles reporting on research breakthroughs, making them easier to find through Google, PubMed Central, and other search channels. Users are directed to the best available versions of the articles in context on the journal publication sites, where they are accompanied by update information, corrections and retractions, links to related articles, commentaries or editorials, and other essential tools.

Publishers: CHORUS’ services and best practices provide publishers with a cost-effective solution to meet funding agency requirements. Built on a technology framework already in use, CHORUS saves publishers time and effort in developing custom solutions for different funders. Another advantage is that CHORUS directs search results to publishers’ own journal sites, enhancing the value to advertisers, librarians, and readers. For more information on becoming part of CHORUS, please see our Join page.

Institutions: CHORUS enables open access to research literature using existing systems that work well with the platforms and processes already used by libraries and academic institutions. By doing so, CHORUS minimizes the cost of compliance, thereby preserving funding for research itself. CHORUS’ dashboards make it easy to monitor author and publisher compliance. Other advantages are that CHORUS directs search results back to the best available versions of articles in context and with essential tools, updates, and information and guarantees their preservation in perpetuity.

Who is involved in CHORUS?

CHORUS is a cooperative effort involving publishers, funding agencies, technology and resource partners, and other organizations involved in scholarly publishing for the public benefit. Since the passage of the America COMPETES Act in 2010, and the issuance of the U.S. Office of Science and Technology Policy’s directive in February 2013, the publishing community has been working closely with funders and other stakeholders to expand access to scholarly publications reporting on funded research. Crossref’s Open Funder Registry, which launched in May 2013, grew out of this collaboration and CHORUS takes the effort to the next level.

More than 100 signatories already support CHORUS, including not-for-profit and commercial publishers and the technology partners and organizations that support them, who collectively produce the vast majority of published articles reporting on funded research. The Board of Directors of CHOR, Inc., the organization behind CHORUS, includes 14 representatives from this group (a full list of Directors can be found here).
 CHORUS is a non-profit organization with 501(c)(3) status. As a result, contributions are tax deductible, to the extent permitted by law.  We suggest you consult with your tax advisors to determine if your contributions meet that criteria.

As the organization that enables reference linking of the world’s online scholarly literature, Crossref is an important CHORUS service provider and plays a key advisory role in its development and governance. CHORUS connects to Crossref’s robust infrastructure, extended to include funding information in the metadata.

Funders, academic institutions, and libraries play an important advisory role in our development and future innovations, which is essential for broadening open access to articles reporting on funded research. Moreover, active funder and institutional participation is key to taking this collaboration even further. The tools CHORUS uses to identify research articles as digital objects and connect them with authors and funders hold promise for developing additional capabilities beyond current applications. If agencies and others build research data infrastructure with these tools, the common language will allow for interaction and/or integration. CHOR, Inc. is fully committed to openly sharing information and strategic advice about our technological systems.

Do CHORUS and Publishers profit from CHORUS’ services?

No. CHORUS is an initiative of CHOR, Inc., a non-profit organization that has been granted 501(c)(3) status by the US Internal Revenue Service. The designation, which is retroactive to October 1, 2013, when CHOR incorporated, means that we have met the rigorous standards to qualify as a charity organized and operated for the public benefit.

It is an important affirmation of our mission to find a sustainable, cost-effective open access solution that meets the needs of all stakeholders in the scholarly community – researchers, funders, academic institutions, libraries, the public, and publishers alike.

Why is CHORUS an effective solution?

CHORUS is an effective solution for meeting open access requirements put forth by the U. S. Office of Science and Technology Policy in February 2013, as well as a growing number of other funders open access requirements, offering significant advantages in terms of access, cost, ease of use, and compliance.

Access: By using publishers’ existing journal platforms, readers have access to readily discoverable, best-available versions of the articles in context on the journal publication sites, accompanied by update information, corrections and retractions, links to related articles, commentaries or editorials, and other essential tools

Cost: CHORUS builds on proven infrastructure and does not require agencies or publishers to create expensive new services. Cost-effective use of existing systems aligns with the open access policy goals, saving funding to support research. Publisher investments are minimized because most participants already use our technology base.

Ease of use: CHORUS builds compliance into the existing publishing process. Authors simply indicate their funding sources when submitting an article to a CHORUS member publication. The rest is done automatically, eliminating time spent by researchers navigating complex regulations and administrative procedures. For funding agencies and research institutions, CHORUS’ dashboard application offers easy-to-use tools to monitor compliance with requirements.

Compliance: Compliance rates are likely to increase because CHORUS makes the process much easier for researchers. CHORUS simultaneously streamlines the process and reduces the administrative burden on all stakeholders.

How can Publishers, Funders, Academic institutions, Libraries, and other organizations engaged in scholarly publishing join CHORUS?

CHOR, Inc. invites all organizations, businesses, and institutions involved in scholarly communications to become part of CHORUS.

You can choose from a number of ways to participate, with different levels of engagement and investment: Publisher Members, Affiliate Members, and Funder Partners.

Membership Options

Publisher Member

Open to publishing organizations and businesses (fee-based).

Publisher Members are entitled to the full array of benefits and services CHORUS provides. In addition, you will have the opportunity to join our Board of Directors and/or working groups, contribute to CHORUS’ governance, and help guide our future. Membership also includes a listing and logo on the CHORUS website, as well as other opportunities to promote your membership.

Request Membership

Please email info@chorusaccess.org if you wish to join as a Publisher Member.

More information about Publisher Membership.

About CHORUS’ Member Fees

Member fees are vital to CHORUS’ success—they cover our lean development and operating expenses. Yet they represent good value for our member businesses and organizations, amounting to much less of an investment than would be needed for your own open access compliance framework.

CHORUS is a service run by CHOR, Inc. an independent not-for-profit membership organization. CHOR, Inc. reserves the right to change these fees in the future. For General Publisher Member Policies, see Membership Agreement.

Click here for Publisher Member Fees ($U.S.)

Member Obligations

  • Sign the CHORUS Publisher Member Agreement
  • Pay your fees to help cover expenses
  • Become a member of Crossref and sign up for their Open Funder Registry
  • Submit funding related data to Crossref for all new content
  • Send open access content reuse License and Embargo metadata to Crossref
  • Deposit full text URLs with Crossref
  • Send relevant content to an associated archiving service such as CLOCKSS and Portico
  • Expand open access from your online platform to provide access to the Best Available Version(s) of articles reporting on funded research (Accepted Manuscript or Version of Record) after an embargo or immediately according to your license terms

Affiliate Member

Open to non-publisher organizations and businesses involved in scholarly publishing (fee-based).

Affiliate Members are entitled to the full array of benefits and services CHORUS provides. In addition, you will have the opportunity to join our Board of Directors and/or working groups, contribute to CHORUS’ governance, and help guide our future. Affiliate Membership also includes a listing and logo on the CHORUS website, as well as other opportunities to promote your membership.

Request Affiliate Membership

Please email info@chorusaccess.org if you wish to join as an Affiliate Member.

More information about Affiliate Membership.

About CHORUS’ Affiliate Member Fees

Affiliate Member fees (see tables and notes below) are vital to CHORUS’ success—they cover our start-up and operating expenses. Yet they represent good value for our member businesses and organizations, who will gain increased visibility through participation in this industry-wide effort..

CHORUS is a service run by CHOR, Inc. an independent not-for-profit membership organization. CHOR, Inc. reserves the right to change these fees in the future. For General Affiliate Member Policies, see Membership Agreement.

2018 Affiliate Membership Fees ($U.S.)

Total Gross Revenue* Annual Affiliate Membership fee
<$2.5m $550
≤$5m $1,100
≤$20m $5,000
≤$50m $10,000
≤$100m $20,000
≤$200m $35,000
≤$500m $50,000
>$500m $75,000

Notes on definition of “Gross Revenue”

  1. Gross Revenue includes all revenue from all the divisions of an organization for all types of activities.
  2. The Affiliate member is considered to be the largest legal entity rather than a division. Membership fee billing will be done on a calendar year basis.
  3. Affiliate Members will self-categorize.

Affiliate Member Obligations

  • Sign the Affiliate Member Agreement
  • Pay your fees to help cover expenses
  • Provide client services to submit funding related data to Crossref for all new content
  • Provide client services to send open access content reuse License and Embargo metadata to Crossref
  • Provide client services to deposit full text URLs with Crossref
  • Provide client services to send relevant content to associated archiving service such as CLOCKSS and Portico
  • Expand open access from your online platform to provide access to the Best Available Version(s) of articles reporting on funded research (Accepted Manuscript or Version of Record) after an embargo or immediately according to your license terms

Funder Partner

Open to funding agencies and organizations.

Funder Partners are entitled to the full array of CHORUS benefits and services, notably a cost effective open access solution for the articles reporting on your funded research and customized search and dashboard applications. In addition, you will have the opportunity to advise on the direction of our services. Partnership also includes a listing and logo on the CHORUS website, as well as other opportunities to promote your partnership.

Request Funder Partnership

Please email info@chorusaccess.org if you wish to join as a Funder Partner.

More information about Funder Partnership.

Funder Partner Obligations

  • Sign the CHORUS Agency Partner Letter of Agreement
  • Recommend CHORUS as part of your solution to open access requirements
  • Use CHORUS and Crossref’s Open Funder Registry systems (websites or APIs)
  • Ensure your agency/organization’s details are complete and correct in the Crossref Open Funder Registry
  • Link to openly accessible articles on CHORUS member publisher sites
  • Consider becoming active as a CHORUS advisor

Does CHORUS work for gold open access articles and journals?

Yes, CHORUS works across all peer-reviewed publications that report on funded research, regardless of the business or access model, setting the article availability dates according to individual publishers’ policies.

What about access to funded research data?

Numerous funder plans call for research data derived from funded research to be made openly accessible.

CHORUS addresses the requirements by leveraging existing systems and infrastructure for its streamlined, cost-effective approach. The tools we use to identify research articles as digital objects and connect them with authors and funders hold promise for developing additional capabilities beyond CHORUS’ current applications. As agencies and others build research data infrastructure with these tools, the common language will allow for interaction and/or integration. CHORUS is already experimenting in this area and is fully committed to openly sharing information and strategic advice about our technological systems.

What is CHORUS’ position on embargoes and OPEN OR public access policies?

CHORUS does not take positions — formal or informal — with respect to various open or public access models, embargo periods for published literature, or publishing business models in general. CHORUS’ mission is to provide a technical infrastructure to assist the various stakeholders to facilitate search, discovery, access, archiving, and preservation of articles reporting on funded research on behalf of publishers, for the benefit of funding agencies, the research community, and the general public.

Will CHORUS provide access solutions for funding agencies outside of the U.S.?

CHORUS provides a neutral, stable, and effective means to help increase open access to peer-reviewed publications reporting on funded research. While CHORUS has its roots in meeting the US Public Access Plans, it is now expanding to help meet the needs of funder open access requirements of Japan, Australia, and elsewhere. Increasingly, international scalability is a direction for CHOR, Inc., the not-for-profit organization behind CHORUS. To that end, we welcome conversations with industry organizations and funding agencies outside the US about global opportunities for CHOR, Inc.