Records that people chose to publish. Each one shows who registered a file, and when — and can be checked by anyone, with no account and no permission from the owner.
There is no search box here, and that is deliberate. If you are trying to check a file, you don't have keywords — you have the file. Drop it in here and you will get an exact answer. Searching a registry by keyword is a way of browsing; checking one by fingerprint is a way of knowing.
Records not shown here are private. A private record is exactly as protected and exactly as provable — its owner simply hands the proof over themselves rather than publishing it.