Core Viewpoint - The article discusses the challenges and advancements in tracing AI-generated content, highlighting the emergence of effective methods such as digital watermarks for content verification [1]. Group 1: AI Content Traceability - In the early stages of AI development, tracing content was significantly challenging [1]. - Current advancements in AI technology have led to the development of effective tracing methods [1]. Group 2: Digital Watermarks - The most common method for tracing AI-generated content is digital watermarking, which includes both explicit and implicit types [1]. - Explicit digital watermarks are visible on most AI-generated images and videos, while implicit watermarks are not easily recognizable and require specialized tools for detection [1].