How does Sigstore and Cosign compare to blue/green deployments?

Sigstore and Cosign are tools that enhance the security and trustworthiness of software artifacts through signing and verification processes. They differ significantly from blue/green deployments, which are deployment strategies aimed at reducing downtime and risk by running two production environments. While blue/green deployments focus on the release and deployment phases of the software lifecycle, Sigstore and Cosign concentrate on securing the software supply chain.