0x19e155262f62e9a3692e4777fbda3f8518099c321bb1893ae89d0148d8a2c0c8

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.