CBOR Signature Validation
Diagnostic Notation Hexadecimal notation (including possible #-comments)
Paste a signed CBOR object in the text box or try with the default:
Validation Key (secret key in hexadecimal or public key in PEM, JWK, or COSE format):
Validate CBOR Signature
 
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 Validation Key
You must supply a matching validation key, regardless if the signature comes with a public key or not.

Note that using the online tool, only the last signature in a multiple signature construct is actually verified.