Does Ciphertrace tech work for privacy coins?
That's is indeed to most important question, I think Dash can insure compliance to the FATF travel rule through TRISA. But I'm not so sure about closed blockchains, where sender and receiver are shielded (either optional like zcash or active by default like monero).
They do state :
TRISA enables immediate Travel Rule compliance with minimal impact on transaction flows, all without the need to fork existing blockchains.
I just don't know if those existing blockchains also include closed blockchains / privacy blockchains.