How long does it take to bridge carbon credits and how does the validation work?

The Toucan team approves batches usually two times day. The bridging process takes only a few minutes if you submit the batch just before approvals are made, however, expect to wait about 12-24 hours in most cases before the bridging is complete.
Once bridged, the NFT fractionalization and BCT pooling takes a few transactions (i.e. can be done in a few minutes).