Cohere has introduced model signing for its AI models hosted on Hugging Face to enhance security and transparency by ensuring the authenticity and integrity of AI models, thereby addressing the growing concerns about AI model supply chain vulnerabilities. This initiative, part of Cohere's involvement with the Coalition for Secure AI (CoSAI), employs cryptographic techniques to create a tamper-proof digital signature, verifying the model's integrity, provenance, and properties. By implementing model signing, Cohere aims to mitigate risks such as hidden biases, backdoors, and data leaks, which can subtly undermine AI model reliability. This advancement allows enterprises to automate security policies, streamline compliance, and deploy AI systems with confidence while setting new industry standards for transparency and trust in AI ecosystems. As AI becomes more embedded in critical infrastructure, Cohere views model signing as crucial as SSL certificates are for web security, signaling a significant shift towards securing AI supply chains.