All the proof you need.
Blockchain it is!
The Self Sovereign Attendance App (SSA) allows organizations to create events that can be attended anonymously. Visitors get an invitation and can easily check-in by simply scanning a QR code or connecting via Bluetooth. Thanks to blockchain technology, the information cannot be manipulated, is transparent, and cryptographically encrypted. Authorized (invited) people can access an event and prove their presence afterwards. The SSA app proves that a blockchain-enabled technology can increase safety, transparency, and fairness of different parts of an organization. It also gives the opportunity for many professionals to prove their attendance, instead of being registered by the organizer. It can be used for students to prove they have attended at least the obligatory percentage of classes, and professionals to prove their attendance at masterclasses/workshops needed to keep their licenses.