WebSheriff
Copyright infringement detection services.

Platonic Hood
Australian company, providing patent, trademark, and design searching, maintenance, technical support and watching services.

NRS-Online.com
US service for protecting and authenticating intellectual property rights.

UK Copyright Libraries Agency
Acts on behalf of the five major UK libraries to ensure that they receive legal deposit copies of British and Irish publications.

UK Copyright Service
Independent witness service providing copyright registration. Contains information about copyright protection, details of services, self-assessment form and contact details.

IP Innovations
Washington, D.C. based research company offering a title search facility to check for prior use.

ClearanceDept.com
Specialize in obtaining music rights for clients in all media including film, television, digital media, Internet and commercial advertising.

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

Copyright Aid
Information about copyright law, protection, registration, licensing, infringement and other aspects of intellectual property in the United Kingdom.

Lawmart.com
Search and document delivery service for patents, trademarks and copyrights.

ONK Copyright Agency
Turkish literary and dramatic agency. Features information about copyrights in Turkey and company background.

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.

Official Software, LLC
Provides software for filing works with the U.S. Copyright Office.

Writers, Artists, and Their Copyright Holders
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.

The Copyrights Group Ltd.
Independent licensing agency based in the United Kingdom.

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.

Protect Your Art Copyright Services
The site provides a service for registering work with the US Copyright Office via an online form

Copyright Witness
International copyright registration service. The site provides information on copyright laws, copyright notices and advice on copyright protection.

WorldWideOCR
Provides a service where members can store sealed, time stamped copies of their work online.

Copyscape - Website Plagiarism Search
Finds copies of your content on the web to help prevent plagiarism and copyright infringement.

Legacyworks
Consultants in copyright termination, transfer of grant, publishing termination and song recapture.

Copyright Information Center at Cornell University
Information about copyright issues, obtaining permission and other key areas relating to copyright regulations