0x6d8a78c13af3229bf7d7498bc66fbe3551d2c72b8b7da5a00bb11d3150dbaf86

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.