ISBN, Copyright & Trademark
Registries and search tools for identifiers, copyright and brand names.
8 listed, sorted by name. A tool can appear in more than one category.
Price:
Only:
| Tool | What it is | Price | KDP | Checked |
|---|---|---|---|---|
| Bowker MyIdentifiers | Bowker MyIdentifiers is the official U.S. agency where publishers buy ISBNs. | Price: Paid | Checked 2026-11-09 | |
| International ISBN Agency Official | The International ISBN Agency is the global registration authority for ISBNs, with a free directory that tells publishers which national agency to buy from. | Price: Free | Checked 2026-11-09 | |
| Library of Congress PCN Program Official | The Library of Congress PCN Program is a free U.S. service for authors and self-publishers that assigns a Library of Congress Control Number before a print book is published. | Price: Free | Checked 2026-11-09 | |
| Nielsen ISBN Store (UK & Ireland) Official | The Nielsen ISBN Store is the official ISBN agency for publishers based in the UK, Ireland and British Overseas Territories, selling single ISBNs and blocks. | Price: From GBP 93 | Checked 2026-11-09 | |
| TMview Official | TMview is the EUIPO-led free trademark search tool for checking whether a series, imprint or brand name is already registered across the EU and partner offices. | Price: Free | Checked 2026-11-09 | |
| U.S. Copyright Office | The U.S. Copyright Office is the government registry where authors register copyrights and look up existing registrations. | Price: From $45 | Checked 2026-11-09 | |
| USPTO Trademark Search | USPTO Trademark Search is the free official database for checking whether a book title, series or brand name is already trademarked in the United States. | Price: Free | Checked 2026-11-09 | |
| WIPO Global Brand Database Official | The WIPO Global Brand Database is a free international trademark search for checking a book series or brand name against Madrid System and national registers. | Price: Free | Checked 2026-11-09 |