0x8d3a6a57a0268ac17a8bbf4c99c4a480df0e423604662fae59a13e58e73ef7ee

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.