For V2
We use BLS keys with BBS signatures for ZKP - And Ed25519/X25519 keys for Zcaps with Jcs Ed25519 signature scheme. Using a combination of did:web, did:ion, did: indy, etc. You can find more about it here.
Signature Specifications
The signatures specified here - https://github.com/trinsic-id/ld-proofs-dotnet#linked-data-proofs-for-net