Proof Layer for Co-Creation Seal: Verifiable Human-AI Co-Creation Framework

This paper proposes “Proof Layer,” a cryptographic verification framework designed to support transparent and auditable human-AI co-creation workflows. As a complementary layer to the Co-Creation Mode framework, its purpose is to transform creative process records into verifiable, tamper-resistant evidence that can be independently examined by third parties. The framework combines sequential hash chaining, external timestamp anchoring, and identity binding to establish integrity, existence proof, and attribution of creative actions throughout the production process. Rather than focusing solely on final outputs, Proof Layer enables the preservation and verification of creative provenance, allowing human involvement to be documented, reconstructed, and validated over time. By separating workflow generation from verification infrastructure, the framework provides a foundation for future authorship assessment, creative provenance systems, and legally relevant process evidence in AI-assisted creation. This approach shifts the emphasis of creative value from static artifacts to verifiable creative processes. Keywords proof layer; creative provenance; human-AI collaboration; hash chaining; timestamp anchoring; authorship verification; proof of creation; copyright; blockchain anchoring; verifiable creative processes