0x11a0151f6ba5df4674f31606c5b88c03392e4f1c86bc3fbdf47e0a175a25f4de

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.