crypto stamp  

Md Saiful Islam Chowdury

Market 3 years ago
The crypto stamp is the world’s first ever blockchain stamp. This makes Österreichische Post AG the first postal company to introduce a stamp that can be used for postage purposes but is also saved as a digital image within the blockchain. Crypto stamp 1.0 was issued in 2019 and bears a unicorn, the heraldic beast of the Ethereum community.