Request a new feature, or support for a camera/lens that you would like to use in Capture One.
I find very disappointing that Capture One artificially limits the Content Credentials to the highest paid subscription plans. Content Credentials is a critical feature and is completely free in many other software. Nikon even started implementing Content Credentials in their firmware and Adobe Lightroom can use the feature for free, instead with Capture One is not enough to pay for a full subscription, you also want a premium for something that runs entirely local and use local system resources, you don't need any network traffict for Content Credentials to be used, beside the whole implementation is handled by an Open Source library, so you don't even factor any significant cost to maintain it by yourself (most of the commits in the tool are made by Adobe contributors, Capture One doesn't even seem to contribute on this effort). This is very disappointing, and I hope this decision is revisited and the future is made available to everyone, at least to users with an annual subscription.
Thanks for your feedback - this feature does require information to be sent to a server to ensure the security of the signature process. We have not misunderstod how to implement the feature, we have worked with those who created it and who are leading this initiative.