

We safeguard the copyrights of books, academic works, comics, videos, and images from online piracy.
Supporting your company with global expertise
15 years of proven success in combating piracy

SENTINEL
Sentinel – Copyright Guardian was founded in the Bay Area of San Francisco, California, to protect the copyrights of books, publications, comics, videos, and images from online piracy.
In today’s digital landscape, copyright-infringing content is easily accessible across borders and languages via the internet, leading to immense financial losses.
We safeguard your content by removing illegal copies in accordance with the U.S. DMCA (Digital Millennium Copyright Act).
Solutions
Monitoring, takedown, and blocking —
our three core pillars to protect your content from copyright infringement

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Service
We will address copyright infringement thoroughly in six steps.
01
Copyright Infringement Investigation
In addition to automatic crawling, our experienced team will carry out site-specific, language-independent research.
02
Infringement Verification
Visually determine whether it is a pirated copy or licensed content
03
Data collection
All URLs that have been confirmed to be infringing are entered into the system and managed in a database in detailed categories.
04
Takedown Requests
Request removal of URLs containing copyright infringing content in accordance with the US DMCA law
05
Search Engine Measures
Request the search engine to remove illegal content from search results to prevent its spread
06
Ongoing Monitoring
Continuous monitoring of whether pirate sites and social media sites have responded to requests to remove content
Customization
Our services are customized to meet your needs.
The following options are also available, so please feel free to contact us.

Service No.01〜03
Investigation to data collection
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Service No.04
Takedown request on your behalf

Service No.01~06
Comprehensive service
No matter how you customize your service, customers can check our response status in real time on a dedicated portal.
We can also display only the data you need and generate reports accordingly.

Contact
If you have any questions about our services or other inquiries, please contact us here.
611 Gateway Blvd, Suite 120 South San Francisco, CA 94080