In this paper, a new wavelet-based copyright proving scheme is proposed. The original image is not required for watermark verification. Moreover, the proposed scheme does not introduce any visual quality degradation into the original image; however, a feature is extracted from the original image and mixed with the watermark to generate a secret key. This secret key is registered for verification. The feature of the image is extracted from the approximation subband in the t-level of the wavelet decomposition. A series of experiments are conducted to prove the robustness property. The results show that this proposed scheme has high robustness under heavy image signal processing attacks and geometric transformation attacks. Moreover, the experimental results show that our scheme outperforms recent works in most cases.