Blockcerts V3 Proposal - Verifiable Credentials & Decentralized Identifiers

[yosuke]

I just post my proposal here !!

If you want to issue V3, you can use my PR!!

Fix iso format for v3 in cert-tool

I just found the problem of iso_format between cert_tool and cert_issuer in V3. When I tried to issue the template that I created with cert_tool, I got the format error because the value of “issueOn” did not match the method validated below. And this is from cert-tool. Hence, I just send the PR for cert-tool to adjust for cert-issuer’s validater as the proposal. if there is any better way than this one, just let me know!!