The Auditing of the Service Provider

Cybernetica AS created the timestamping technology that cryptographically binds published timestamps with all previous timestamps. New timestamps are periodically published in mass media, so it's impossible to fake timestamps (either to publish one afterwards or modify already published timestamps), even for the service provider.

The cryptographic association between correct timestamps is easily verifiable (even without the service provider's help), but fake timestamps, however, doesn't have that association. This provides reliable and auditable service.

The following animation explains how the timestamp service provider is audited.