Matching outbound Sip Calls

I configured Vapi with my own sip trunk (asterisk based).
When I create an outbound call with vapi.. I get a call_id in return.

I'd like to match that call in asterisk, but I cannot find a way to do it.
VAPI seems to send a Call-Sid header but it's a different value than the call_id I get when creating the object.
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