At regular intervals, Iperial.com publishes lists of all content that has been registered in the system during previous intervals. These lists contain cryptographic hash digests of each piece of content that was registered (the content id), together with the cryptographic hash digest of the content id and the timestamp and signature of the registrations (the registration id). Together, these hashes prove that a specific piece of content has been registered, what time and date the registration was created and which signature was used to sign it.
To help prove that these lists remain unmodified after they have been published, we invite everyone to download and keep local copies of the published files. In addition to being available for download here, they are also published on a number of other places, for example:
Drop a file here to either check if it's registered, or to register your ownership of it. No files will be uploaded, so the process is completely confidential.