UK Copyright Service
- Online copyright registration services.
- http://www.copyrightservice.co.uk/

Copyrightvault.com
- Offering independent evidence of your copyright.
- http://www.copyrightvault.com

Click&Copyright
- Provides a filing service for submitting works to the U.S. Copyright Office.
- http://www.clickandcopyright.com

Legacyworks
- Consultants in copyright termination, transfer of grant, publishing termination and song recapture.
- http://www.legacyworkscopyright.com/

Copyscape
- Search engine to locate duplicated materials on the Internet.
- http://www.copyscape.com/

WorldWideOCR
- Provides a service where members can store sealed, time stamped copies of their work online.
- http://www.worldwideocr.com

Copyright Protection Services International
- Supplier of tamper proof security envelope to secure your work and prove at a later date that the contents have not been tampered with. FAQs, price, and contact details.
- http://www.protectcopyrights.com/

The Copyrights Group Ltd.
- Independent licensing agency based in the United Kingdom that represents writers, artists and corganisations for licensing to manufacturers and consumers.
- http://www.copyrights.co.uk

HRC Watch
- Database of contact information for the copyright holders of authors and artists whose works can be found in libraries and archives across North America and the UK.
- http://tyler.hrc.utexas.edu/

Official Software, LLC
- Provides software for filing works with the U.S. Copyright Office.
- http://www.officialsoftware.com/

Indiana University - Copyright Management Center
- Provides information and education services about copyright, fair use, and infringement. Aimed at the university sector, but has information for all.
- http://copyright.iupui.edu/index.htm

ONK Copyright Agency
- Turkish literary and dramatic agency. Features information about copyrights in Turkey and company background.
- http://www.onkagency.com

Lawmart.com
- Search and document delivery service for patents, trademarks and copyrights.
- http://www.lawmart.com/

Copyright Aid
- Information about copyright law, protection, registration, licensing, infringement and other aspects of intellectual property in the United Kingdom.
- http://www.copyrightaid.co.uk/

Infringement Watch
- Washington DC based non-profit organization of visual arts businesses dedicated to the control of members' copyright images.
- http://infringementwatch.org

ClearanceDept.com
- Specialize in obtaining music rights for clients in all media including film, television, digital media, Internet and commercial advertising.
- http://www.clearancedept.com

IP Innovations
- Washington, D.C. based research company offering a title search facility to check for prior use.
- http://www.ipinnovate.com/

NRS-Online.com
- US service for protecting and authenticating intellectual property rights.
- http://www.nrs-online.com/

WebSheriff
- Copyright infringement detection services.
- http://www.websheriff.com/