voice_rights_attestation_stale
POST /v1/voice-profiles: the echoed version/SHA-256 of the Voice Rights & Consent Attestation is not the one this deployment serves - the document changed between render and signature. Fetch GET /v1/voice-rights-attestation again and re-collect the signature.
Problem shape
Every non-2xx response is an RFC 9457 application/problem+json body. The type URI below is stable and machine-matchable, so branch on the final path segment (the code) and treat the status as redundant confirmation. See the error-handling guide.
{
"type": "https://docs.vocapable.com/errors/voice_rights_attestation_stale",
"title": "…",
"status": 409,
"detail": "…",
"instance": "/v1/…"
}