At the time of writing it has been worked out under the responsability of the DM WG by the IVOA provenance data model author team.

Hence the ProvTAP internal draft, the ProvTAP Tap schema and a VOTable dump of a prototype service operated by CDS (ProvHiPS) is stored since monthes on the DM WG pages (https://wiki.ivoa.net/twiki/bin/view/IVOA/ObservationProvenanceDataModel).

ProvTAP Internal draft : https://wiki.ivoa.net/internal/IVOA/ObservationProvenanceDataModel/ProvTAP.pdf

ProvTAP TAP schema : https://wiki.ivoa.net/internal/IVOA/ObservationProvenanceDataModel/ProvTAP-schema-new.xml

ProvTAP VOTable dump example : https://wiki.ivoa.net/internal/IVOA/ObservationProvenanceDataModel/ProvHiPS.xml