0x8b7226cef6d9d440d099db52dd6b2ac8e2633084f44be524072500b0d0ef572c

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.