We use several DIDs to sign and to issue verifiable credentials
Here is a list of our DIDs
Primary DID
did:web:app.altme.io:issuer
Secondary DIDs
Tezos (did:tz) :
did:tz:tz1NyjrTUNxDpPaqNZ84ipGELAcTWYg6s5Du
DNS (did:web) :
did:web:talao.co
Ethereum (did:ethr) :
did:ethr:0x61fb76ff95f11bdbcd94b45b838f95c1c7307dbd