Open Access Licence to Post

Like other registries following the clinical trial registration standards published by the World Health Organization, the ISRCTN registry exists to keep in a standard format a freely accessible and searchable record of each registered study. The Terms and Conditions enable anyone to cite with attribution the details in each study record. They encourage unrestricted use of the metadata generated during the process of registration, updating or reporting. The CC BY licence allows readers (users) to copy, distribute and transmit the Database Contribution as long as it is attributed back to the Researcher. Readers are permitted to alter, transform or build upon the Database Contribution, and to use the Database Contribution for commercial purposes. Please read full details at

  1. Licence

    ISRCTN (the ‘Licensee’) will consider posting this Database Contribution (including any supplementary information and graphic elements therein (e.g. illustrations, charts, moving images) (the 'Contribution'), including granting readers rights to use the Contribution on an open access basis under the terms of the Creative Commons licence above. Headings are for convenience only.

  2. Grant of Rights

    ISRCTN (the ‘Licensee’) will consider posting this Database Contribution (including any supplementary information and graphic elements therein (e.g. illustrations, charts, moving images) (the 'Contribution'), including granting readers rights to use the Contribution on an open access basis under the terms of the Creative Commons licence above. Headings are for convenience only.

    1. Subject to editorial acceptance of the Contribution, it will be made available under the Creative Commons licence shown above. In consideration of the Licensee evaluating the Contribution for inclusion, the Researcher(s) grant the Licensee a non-exclusive, irrevocable and sub-licensable right, unlimited in time and territory, to copy-edit, reproduce, publish, distribute, transmit, make available and store the Contribution, including abstracts thereof, in all forms of media of expression now known or developed in the future. Furthermore, to enable additional publishing services, such as promotion of the Contribution, the Researcher(s) grant the Licensee the right to use the Contribution (including any graphic elements on a stand-alone basis) in whole or in part in electronic form, such as for display in databases or data networks (e.g. the Internet), or for print or download to stationary or portable devices. This includes interactive and multimedia use as well as posting the Contribution in full or in part on social media, and the right to alter the Contribution to the extent necessary for such use. Researcher(s) grant to Licensee the right to re-license Contribution metadata without restriction. For the avoidance of doubt, the Plain English Summary, Results (plain English), Study hypothesis, Intervention, Primary outcome measure, Secondary outcome measures, Publication and dissemination plan, IPD sharing plan statement, Basic results (scientific) and Additional files are covered by the CC BY licence. All other content is considered to be metadata and can be used without attribution. For Contributions submitted on or after 1st January 2019, the Researcher agrees that metadata can be reused without restriction on a CC0 basis.
    2. After the first posting (known as ‘registration’ – see, ISRCTN will have the right to contact researchers, either at key milestones or whenever the needs arise, to ensure that the Contribution remains up-to-date in line with international standards. The content of the updates is the sole responsibility of the researchers and will follow the same rules as the initial Contribution.
  3. Researcher’s Retained Rights
    1. Ownership of all copyright remains with the Researcher(s), provided that, when reproducing the Contribution or extracts from it, the Researcher(s) acknowledge and reference first posting in the Database.
    2. The Researcher can contact ISRCTN at any time to request updates of the contribution.
  4. Warranties

    The Researcher(s) warrant and represent that:

    1. (i) the Researcher(s) are the sole owners or have been authorised by any additional copyright owner to license the rights defined in clause 2, (ii) the Contribution does not infringe any intellectual property rights (including without limitation copyright, database rights or trade mark rights) or other third party rights and no licence from or payments to a third party are required to publish the Contribution, (iii) the Contribution has not been previously published or licensed, (iv) if the Contribution contains materials from other sources (e.g. illustrations, tables, text quotations) Researcher(s) have obtained written permissions to the extent necessary from the copyright holder(s), the Researcher(s) hereby license to the Licensee the rights to use such materials in accordance with the grant of rights in clause 2 and have cited any such materials correctly;
    2. all of the facts contained in the Contribution are according to the current body of science true and accurate;
    3. nothing in the Contribution is obscene, defamatory, violates any right of privacy or publicity, infringes any other human, personal or other rights of any person or entity or is otherwise unlawful and that informed consent to publish has been obtained for all research participants;
    4. nothing in the Contribution infringes any duty of confidentiality which any of the Researcher(s) might owe to anyone else or violates any contract, express or implied, of any of the Researcher(s), and all of the institutions in which work recorded in the Contribution was created or carried out, have authorised and approved such research and publication; and
    5. the signatory (the Researcher or the employer) who has signed this agreement has full right, power and authority to enter into this agreement on behalf of all of the Researcher(s) including where applicable any government entity or the Crown.
  5. Cooperation


    1. the Researcher(s) shall cooperate fully with the Licensee in relation to any legal action that might arise from the publication of the Contribution and the Researcher(s) shall give the Licensee access at reasonable times to any relevant accounts, documents and records within the power or control of the Researcher(s). The Researcher(s) agree that the distributing entity is intended to have the benefit of and shall have the right to enforce the terms of this agreement.
    2. the Researcher(s) authorise the Licensee to take such steps as it considers necessary at its own expense in the Researcher(s) name and on their behalf if the Licensee believes that a third party is infringing or is likely to infringe copyright in the Contribution including but not limited to initiating legal proceedings.


  6. Researcher List

    Changes in the list of researchers should be approved in writing by the Licensee.

  7. Edits & Corrections

    The Researcher(s) agree(s) that the Licensee may retract the Contribution or publish a correction or other notice in relation to the Contribution if the Licensee considers in its reasonable opinion that such actions are appropriate from a legal, editorial or research integrity perspective.