Here in Ontario there's the
https://www.ontariots.ca/sp/index.html (Google "tire stewardship program" and you'll find more for other places), but they currently do not accept bike tires. I asked my MPP about this, and even got a reply from the Ministry of the Environment saying, as I already knew, that bike tires were not included in the current project. Thanks guys...
I heard the British Columbia got bikes tires added to their program, and would love to find out how they made that happen.