In the past, traditional digital copyright protection system based on digital watermarking focused on implementation of watermarking text or image ignored the generation and storage of watermark information. In this paper, a new design scheme of a copyright management system based on digital watermarking and blockchain is proposed which combines digital watermarking, blockchain, perceptual hash function, Quick Response (QR) code, and Inter Planetary File System (IPFS). The blockchain is used to securely store watermark information that implements to provide a timestamp authentication. A perceptual hash function is used to generate a hash value based on the structure information of the watermark image can be confirmed without the original image. A QR code is used to generate a QR image containing image hash and copyright information of the owner. IPFS is used to store and distribute watermarked images without any centralized server and can reduce information-leakage, improves security and transparency of information to facilitate circulation in the network. Here we give BST to check the perceptual hash values to see whether the image is copyrighted or not.