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-2026-0912-WF46PXLH Content hash 5da2c0e040783b9336a815d9e6d2bb717ea001a26b7df0db8e3ba813e36839c8 Articles recorded that day 12 Attestation UID 0xe3d8bd2eb8f03a62049ad18692cb77891d5172e148e4d05da8c0caa3a3d19861 View on EAS Transaction 0x805d0579370308945e4cd9dcbcee7ba593bbae37a839bbee40333a5f4845cf0a 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 11 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 0x7bed0a21655a03e17a94cb02d84f910ea3b29257ed3292c514789819fb546629 Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value after it 0x20315b0997c2bfe4c264a0d74d259f1ab2fd4ce8d2b1e3451b3994a57481c89a 0x93e6b7be8d3dac139659027698adb5d3466b5e5adb8b31d62176d496d6f35e01 Step 2, combined with the value after it 0x9fd359cf554370f4d68be8d2d72dbb1c30a7e1ebc4ab240496d42aaae482bc1a 0x8d23c52490116aed9c6806c460a82c2867e0d8fa16cde80f349574b442de9011 Step 3, combined with the value before it 0x7a5d92dadcf9090e0ca98ca0332b44c973c20ce01f4370a0e1e7c59929bb124b 0xafe50b3f022867873ac74178a7f6d82f520d3161a2fc7d09780bd513b8ba39e3 This is the value for the whole day.
Value these steps arrive at 0xafe50b3f022867873ac74178a7f6d82f520d3161a2fc7d09780bd513b8ba39e3 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 0xafe50b3f022867873ac74178a7f6d82f520d3161a2fc7d09780bd513b8ba39e3 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-2026-0912-WF46PXLH/canonical" | shasum -a 256Should print 5da2c0e040783b9336a815d9e6d2bb717ea001a26b7df0db8e3ba813e36839c8
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-2026-0912-WF46PXLH
CONTENT=5da2c0e040783b9336a815d9e6d2bb717ea001a26b7df0db8e3ba813e36839c8
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 7bed0a21655a03e17a94cb02d84f910ea3b29257ed3292c514789819fb546629
3. Combine step 1 The value you have goes first, then the published value.
printf '01%s%s' "7bed0a21655a03e17a94cb02d84f910ea3b29257ed3292c514789819fb546629" "20315b0997c2bfe4c264a0d74d259f1ab2fd4ce8d2b1e3451b3994a57481c89a" | xxd -r -p | shasum -a 256Should print 93e6b7be8d3dac139659027698adb5d3466b5e5adb8b31d62176d496d6f35e01
4. Combine step 2 The value you have goes first, then the published value.
printf '01%s%s' "93e6b7be8d3dac139659027698adb5d3466b5e5adb8b31d62176d496d6f35e01" "9fd359cf554370f4d68be8d2d72dbb1c30a7e1ebc4ab240496d42aaae482bc1a" | xxd -r -p | shasum -a 256Should print 8d23c52490116aed9c6806c460a82c2867e0d8fa16cde80f349574b442de9011
5. Combine step 3 The published value goes first, then the value you have.
printf '01%s%s' "7a5d92dadcf9090e0ca98ca0332b44c973c20ce01f4370a0e1e7c59929bb124b" "8d23c52490116aed9c6806c460a82c2867e0d8fa16cde80f349574b442de9011" | xxd -r -p | shasum -a 256Should print afe50b3f022867873ac74178a7f6d82f520d3161a2fc7d09780bd513b8ba39e3
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/0xe3d8bd2eb8f03a62049ad18692cb77891d5172e148e4d05da8c0caa3a3d19861The rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification