I had the good fortune to attend BISG’s meeting on Tuesday “Focus on ISTC” which was a supplement to Michael Holdsworth’s recent paper:
The International Standard Text Code (ISTC): A Work in Progress / A Supply Chain Perspective
The short message for Canadian publishers and data suppliers is that the US and UK supply chain is taking the ISTC seriously and that Canadian publishers should be familiarizing themselves with it too. You might need to be using it soon.