Is CC0-1.0 compatible with Unlicense?
Yes.
No obligations either way. Result license is the more restrictive of the inputs. You must satisfy every input license's notice and source-offer terms. Verify pairwise compatibility first.
Resulting work's license: CC0-1.0
General guidance, not legal advice.
Obligations when redistributing as open source
- CC0-1.0: No patent grant.
Other distribution models
The verdict is the same under every distribution model; the obligations differ. Check this pair in the tool to switch models.