0xf9c3e74b26fe086de534ebfc9e20cc4ab3861c2074f12a7b511656fded1a8d19

How to verify this batch yourself

Take any stamp's content hash, walk the merkle proof in its certificate to recompute the root, then call timestamps(root) on the BA Stamper contract on any Polygon full node. The block timestamp returned is the on-chain proof — no trust in BA Stamp required.