There's another article about it here:

https://www.theweathernetwork.com/en/news/science/earth-scie...

An academic paper with the solution here:

https://www.tandfonline.com/doi/full/10.1080/01611194.2023.2...

The initial blog post about the piece of paper in the dress:

https://commitmentocostumes.blogspot.com/2014/02/bennetts-br...

For me this raises as many questions as it answers in some ways. I have no idea why it would be hidden away like that.

Academic paper with far more detail, including the decoding of all messages here: https://canwin-datahub.ad.umanitoba.ca/data/publication/brea...

Related article from which the CBC YouTube video is associated:

https://news.ycombinator.com/item?id=38721406

Cool, but once again it turns out that real life is not like a Dan Brown novel. No Illuminati, no antipopes, no buried treasure, just everyday activities that apparently needed some level of protection.