Certificate of Authenticity

A document that holds up to scrutiny.

Signed by the gallery directors. Registered against the JG provenance ledger. Travels with the work for life. Reissuable on the chain if the physical certificate is ever lost.

What the COA contains

Eight fields that travel with every piece.

Artist + work

Artist name with verified credential tier · work title · year · medium · dimensions · catalogue number where applicable.

Origin record

How the work entered JG inventory. Studio acquisition · estate consignment · approved secondary market with full prior chain.

Chain head reference

The SENTYAL chain head at the moment of canonization. Lets the holder verify the provenance ledger entry independently at any later time.

Edition information

For editioned works: total edition size, edition number for this piece, artist proofs noted separately.

Condition baseline

Surface · structure · frame condition at acquisition, with date-stamped photography reference.

Authority signatures

Signed by gallery directors. Counter-signed by the artist for living artists when feasible.

Reissue clause

If the physical certificate is ever lost, a replacement can be issued from the chain record. The work is never orphaned from its provenance.

Language discipline

Attribution opinion language throughout. Never guarantee, never certified without basis. Precision is the entire point.