The URN form ECDSA signature algorithm is
But I am not able to find a named URN for algorithm SHA1withECDSA or SHA256withECDSA.
Up to now I've found the xmldsig URL for this algorithms: http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1 and http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256
And I have the option to generate the URN with its OID, according to RFC3061:
I could even create my own version of its URN as something like urn:nist-gov:ecdsa-sha1 and urn:nist-gov:ecdsa-sha256
But, is it a named standard URN for signature algorithms SHA1withECDSA and SHA256withECDSA?