Correction to: Nature Photonics https://doi.org/10.1038/s41566-024-01588-8, published online 6 January 2025.

In the version of the article initially published, in the first paragraph of the “Testing optical clock lock with drift” section of the Methods, “…whose frequency drift is low (~60 MHz s–1)” should have read “…whose frequency drift is low (~60 mHz s–1)” and has now been corrected in the HTML and PDF versions of the article.