Authorship attestation for "Eth contract data pt 3. How to run your own graph node"
https://cdrn.xyz/blog/slurpingcontractdatapt3/

Statement (signed exactly as the lines between the markers, EIP-191 personal_sign):

-----BEGIN STATEMENT-----
I am the author of "Eth contract data pt 3. How to run your own graph node" (https://cdrn.xyz/blog/slurpingcontractdatapt3/).
sha256: 11a3cd9e65819024eb9d6241fc414da5c1dc32b22a09df1e523cb4c9e9d276af
Published 2023-09-05. - cdrn / cdrn.xyz
-----END STATEMENT-----

Signer:    0x34eb878aB45D2a0a7B37cF5728c50E23ac4AB7C1
Signature: 0x6b49bf9fac621f3330371fe9487f7b47931f4eb1cd1a5f5c6f0d42477fe26cb33fd829948f657b8b3f4aa1822659b68f09576c70ba03096780a09c5558f5f9271c

Verification:
- The sha256 is of slurpingcontractdatapt3.md (the post markdown source, published alongside this attestation) as of the attestation date. Later edits change the hash; the attestation binds this revision.
- The same hash is anchored into Bitcoin via OpenTimestamps: slurpingcontractdatapt3.md.ots (verify with ots verify).
- Earlier attested revisions, if any, are archived under provenance/ in this directory: pre-image, .ots proof, and signed statement for each - the timestamp of the first revision is the priority claim.
- The signature verifies with any EIP-191 personal_sign verifier (ethers verifyMessage, viem, cast wallet verify).