Blockchain technology has the information like timestamp, hash hash value and distributed storage, it is good to keep the information of the artworks and the distributed database in the realization symmetrical.

Physical certificate

1. The artist's signature on the work of art

2. Certificate of the artist's autograph

3. The artist uploads the signature and identification of the physical characteristics of the work's authenticity, describes the text in detail, and uploads it encrypted to the database

4. Relevant authentication information can be read through the trigger conditions and passwords pre-set by the NFT smart contract.