Each node involved in the maintenance of blockchain can obtain a complete data record. With the characteristics of reliable and collective maintenance of blockchain, the rights of the owners of rights and interests can be confirmed and applied to the transaction of various financial products. For the need to store permanent records, blockchain is the ideal solution for scenarios such as land ownership and equity transactions. Among them, equity proof is the most tried and applied field at present. The equity owner can prove the ownership of the equity with the private key. When the equity is transferred to the next company through the blockchain system, the property right is clear and the record is clear. There is no third party involved in the process.