This work explores the evolution of watermarking techniques designed to preserve the integrity of digital image content, especially against perturbations encountered during image transmission. An overlooked vulnerability is unveiled: existing watermarks' detectability significantly drops against even moderate generative model modifications, prompting a deeper investigation into the societal implications from a policy viewpoint. In response, we propose ANCHMARK, a robust watermarking paradigm, which remarkably achieves a detection AUC exceeding 0.93 against perturbations from unseen generative models, showcasing a promising advancement in reliable watermarking amidst evolving image modification techniques.