Comment on Safe Harbor

Under section 512 of the DMCA, Internet Service Provider (ISP) is not held liable for instances of copyright infringement as long as the ISPs satisfy some statutory requirements. ISPs does not have any obligations to watch for or block potential infringement before the materials are uploaded on their services.
However, it is not fair for only copyright owners to have responsibility to watch for infringement of their works on ISPs sevices. Today, it may be impossible for copyright owners to be aware of infringement of their works, because there exist may ISPs, and users using these ISPs are so huge. So, it is necessary for copyright owners and ISPs to share responsibility to watch for or block infringements related to the works uploaded. This approach may be possible, because filtering technology which prohibits unauthorized works from being uploaded on ISPs' services have existed.