For an employer or verifier
How do I check this badge?
You can confirm this badge is genuine without trusting Andamio — the proof lives on the Cardano blockchain, and the badge is a portable copy you can verify independently.
Status. Today most Andamio badges prove themselves by their on-chain anchor (plus the Proof-Ring encoding on the badge face); a cryptographic signature over the portable copy is present on signed badges and is rolling out to the rest. Where a signature isn't present yet, the chain still backs the badge — the on-chain check below (step 3) needs no signature at all.
Who stands behind it
Four parties produce an Andamio credential, each carrying a different part of the trust: an issuer (the pseudonymous person who created the course and stands behind what its credentials mean), an assessor (the evaluator named on-chain, where the record yields one), the chain (Cardano, the immutable record of what happened and when), and Andamio (which anchors the credential on-chain and signs this portable copy). Andamio attests that the on-chain record is real and that this document matches it — not that the achievement is significant. That meaning belongs to the issuer and the assessor.
What you can rely on
If this badge verifies, a clear, narrow set of facts holds: a real person holds it; they completed a process recorded on Cardano at a specific time, naming an assessor; and it stays verifiable for as long as they hold it. What you should not assume is that Andamio vouches for the rigor — that is the course owner's and the assessor's to stand behind.
How to check it (no Andamio trust required)
- Read the credential. The badge SVG carries an Open Badges
3.0 / W3C Verifiable Credential document. Its issuer is
did:web:credentials.andamio.io; its evidence entry carries the on-chain anchor (network, course id, the recipient's on-chain asset, and the claim transaction hash). - Resolve the issuer and check the signature (on a signed
badge).
did:web:credentials.andamio.ioresolves to a published signing key; verify the Data Integrity proof against it with a DI-capable OB 3.0 / VC verifier (for example spruce or the 1EdTech validator). Verifiers that read only JWS-style credentials will not read this proof format. If a badge isn't signed yet, there's no signature to check here — go straight to step 3; the on-chain anchor is the proof. - Chase the anchor on-chain. Look up the claim transaction on a public Cardano explorer or on andamioscan.io, and confirm it matches the credential's course id and on-chain asset. This step needs no trust in Andamio at all — the ledger is the source of truth.
- Check status, if you want to. The credential points to a hosted status list that flags signing-key freshness (a key-version signal, not a statement that the badge wasn't earned). The chain stays authoritative.
Today a badge surfaces its evidence at the hash-and-anchor level — enough to prove the evidence exists and is anchored, without exposing the raw work, which stays private to the holder. A holder-controlled way to reveal the underlying artifact is on the way.
For the full technical walk-through — the exact fields, the verification-result meanings, and a worked example — see the verifier guidance.