[PuffinBlue]

I wasn't sure it would be enough on my own site so I put a notice in the footer notifying that some rights are reserved and then linking to a page that specifically breaks down content by section and the license terms applied:

https://www.josharcher.uk/copyright/

Perhaps as you mention it's necessary to publish more explicit notices alongside content. But perhaps not. This ruling seems to relate to data, possibly distinct from creative works.