Due to the nature of the trusted setup, there will be no way to verify the true supply of Zcash.
We can never verify that only 21 million coins will ever exist. Many have pressured Zooko to address this, but it seams the Zcash team is content not to.
As such, I'm working on building a team to fork Zcash. The goals:
1) make the supply auditable by enforcing a once-per-[epoch] transaction which reveals
not who but
how much funds are owned. Any funds not moved in each audit, won't be fungible going forward. We can then be certain that inflation is happening according to the stated parameters, and we no longer need to trust those launching the protocol.
2) Remove the founder's reward. The founders will be well-compensated by Zcash. We intend for no pre-mine, no ICO, no founder reward mechanism. Just honest mining from the genesis block.
3) Undecided: Whether to make anonymous transactions compulsory. The ability
not to use anonymous transactions weakens the rest of the network's anonymity. But there are big tradeoffs to making this change, due to the computational heaviness of ZKsnark transactions.
Anyone interested in developing this fork, please contact me. We are a small group pooling funds to pay developers.