0x42a1621c4927bcec852dab5fa84f702ad053e42ba533b8710e2e5e8d81f25376

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.