This article has not changed since Vitahash recorded it on the Base blockchain. Everything below can be checked without taking our word for any of it.
Stamp ID STAMP-2026-0909-RQLJXUM7 Content hash 644c3477b70811f8ab84dc167a1392bcac82db5ea6ef43fba6d70da36df39360 Articles recorded that day 8 Attestation UID 0xf8f0e64849d3ba6f01e8709c90250a8b400b96bd9576e39e7949fa6c0043408b View on EAS Transaction 0x74e43b2e9ba0b4a17a30a17cd69341ab9f4af4cebcdb4747b7188b0b5e486d70 View on Basescan Recorded on Base using canonicalization v1 and record format v1.
How this article reaches the blockchain It was combined with the other 7 articles published that day, one step at a time, until the whole day became a single value. That one value is what Vitahash wrote to the blockchain. Change a single character of this article and the starting value below changes, so none of the steps would land on the recorded one.
Starting value for this article 0xc5f1c193531d35a241ccce7d34a4077e4e09b48ae163d09e0795f4c0d87361ee Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value before it 0xfbdb54ae5c507293702ee0a9da31c865b3a8afa097a348a79e9195f1ae89679b 0xb6bbedcf5392a6c93eeb861d134575755aa24767dbaa5f68c31a0a4b496717d3 Step 2, combined with the value after it 0xfacfea826e85751fb7165e01c0d0926d94cd991d236e1900c5aff4ba2574aea7 0x017a0ea40754398dd234718206ec2e41b1a8edbba60ed294acb0d81580cdbd00 Step 3, combined with the value before it 0x97af53e90c4e942303167c11b3028a112931ba0b2216464cdd9d2eafcea2a2a1 0xb7d6c53003650ad4e6f8678e2531b950631a1d481cd3edde23566d77738d5048 This is the value for the whole day.
Value these steps arrive at 0xb7d6c53003650ad4e6f8678e2531b950631a1d481cd3edde23566d77738d5048 What the blockchain says Two values, reached two different ways. The one above was worked out from this article. The one below was read back from the record on Base.
Worked out from this article 0xb7d6c53003650ad4e6f8678e2531b950631a1d481cd3edde23566d77738d5048 They are the same value, so this article was published that day with exactly the text above.
Check it yourself Every number on this page came from Vitahash. Copy the article's exact text below and check it against the hash above, using any SHA-256 tool.
The exact text is not available for this article right now. The command below still reaches it.
1. Hash the article yourself This downloads the exact text Vitahash hashed, in the exact form it hashed it, and hashes it again on your machine. Nothing Vitahash wrote runs here.
curl -s "https://api.vitahash.org/api/verify/STAMP-2026-0909-RQLJXUM7/canonical" | shasum -a 256Should print 644c3477b70811f8ab84dc167a1392bcac82db5ea6ef43fba6d70da36df39360
2. Build this article's starting value The stamp ID is folded in with the hash, so one article's record can never stand in for another's.
STAMP=STAMP-2026-0909-RQLJXUM7
CONTENT=644c3477b70811f8ab84dc167a1392bcac82db5ea6ef43fba6d70da36df39360
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print c5f1c193531d35a241ccce7d34a4077e4e09b48ae163d09e0795f4c0d87361ee
3. Combine step 1 The published value goes first, then the value you have.
printf '01%s%s' "fbdb54ae5c507293702ee0a9da31c865b3a8afa097a348a79e9195f1ae89679b" "c5f1c193531d35a241ccce7d34a4077e4e09b48ae163d09e0795f4c0d87361ee" | xxd -r -p | shasum -a 256Should print b6bbedcf5392a6c93eeb861d134575755aa24767dbaa5f68c31a0a4b496717d3
4. Combine step 2 The value you have goes first, then the published value.
printf '01%s%s' "b6bbedcf5392a6c93eeb861d134575755aa24767dbaa5f68c31a0a4b496717d3" "facfea826e85751fb7165e01c0d0926d94cd991d236e1900c5aff4ba2574aea7" | xxd -r -p | shasum -a 256Should print 017a0ea40754398dd234718206ec2e41b1a8edbba60ed294acb0d81580cdbd00
5. Combine step 3 The published value goes first, then the value you have.
printf '01%s%s' "97af53e90c4e942303167c11b3028a112931ba0b2216464cdd9d2eafcea2a2a1" "017a0ea40754398dd234718206ec2e41b1a8edbba60ed294acb0d81580cdbd00" | xxd -r -p | shasum -a 256Should print b7d6c53003650ad4e6f8678e2531b950631a1d481cd3edde23566d77738d5048
6. Compare with the blockchain The last value above is what the whole day came to. Read the record on Base and check its merkleRoot field is the same. Vitahash is not involved in this step at all.
https://base.easscan.org/attestation/view/0xf8f0e64849d3ba6f01e8709c90250a8b400b96bd9576e39e7949fa6c0043408bThe rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification