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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.

Spontaneous coronary artery dissection (SCAD)

cardiovitahash · 26 Aug 2026

Stamp ID
STAMP-2026-0826-MY6QQ75O
Content hash
bd2e8c1bd0f189e9a85ddda1d4ec474c7bf5f37d41097b4a028fbf74571c46e5
Day recorded
2026-08-27
Articles recorded that day
10
Attestation UID
0xe9594f1c42a4ac3701b860a351cf04e831783def05460049c9572d205cc57f43
View on EAS
Transaction
0xd0bb0633972b35907cdba8ec4fd69a6070b990a29412e09027453092ea78db06
View on Basescan
Stamped
27 Aug 2026

Recorded on Base Sepolia using canonicalization v1 and record format v1.

How this article reaches the blockchain

It was combined with the other 9 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
0xde72e41e8df4029aac473dbd0ba5a51b0aca8b4f27cd71fc67eda197f9d146b6

Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).

  1. Step 1, combined with the value before it
    0xbeaece1fdd99e17e6d7c1bc987197704fcd32f5024e1043a08950d91c0482b8c
    0x76dde7cd482f236a0e6c83be6173705bd5114a5222b225bd32a05a19318416a2
  2. Step 2, combined with the value after it
    0xc112e8612717a7f052b7a4aa8ba4c3650dd800dd421a822ad81d582a1f172412
    0x5f8fd93d1342e6f582a2588d1c24ba86122827e4293e14743a5edbfb0c06c744
  3. Step 3, combined with the value before it
    0x6a9201a5fa622d9e3cfbfb0a4ba6051fc37c1c172f63aa6087bfb245df8b1320
    0xa21c8ba55f0fc6e57b545c6de25652a6b6edb54b52b930f491c0ed5edde1df08
  4. Step 4, combined with the value after it
    0x8680bcd982597baa59b5474438998fb2c932f4e7c4dc44c0962bfa4b522c7829
    0xd18600dbfb6bcb059d5c725341c007e642eceb0a8393d6b788c0fb7609a936ac

    This is the value for the whole day.

Value these steps arrive at
0xd18600dbfb6bcb059d5c725341c007e642eceb0a8393d6b788c0fb7609a936ac

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
0xd18600dbfb6bcb059d5c725341c007e642eceb0a8393d6b788c0fb7609a936ac
Read from Base
0xd18600dbfb6bcb059d5c725341c007e642eceb0a8393d6b788c0fb7609a936ac
Read it yourself on EAS

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.

{"abstract":null,"authors":[{"identity":"cardiovitahash","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"Spontaneous coronary artery dissection (SCAD) is an important cause of acute coronary syndrome, pa…

Copy this text, paste it into any SHA-256 tool, and compare the result with the hash shown above. If the two match, this is exactly what Vitahash recorded.

For a technical reader: the terminal route

  1. 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-2026-0826-MY6QQ75O/canonical" | shasum -a 256

    Should print bd2e8c1bd0f189e9a85ddda1d4ec474c7bf5f37d41097b4a028fbf74571c46e5

  2. 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-2026-0826-MY6QQ75O CONTENT=bd2e8c1bd0f189e9a85ddda1d4ec474c7bf5f37d41097b4a028fbf74571c46e5 DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print de72e41e8df4029aac473dbd0ba5a51b0aca8b4f27cd71fc67eda197f9d146b6

  3. 3. Combine step 1

    The published value goes first, then the value you have.

    printf '01%s%s' "beaece1fdd99e17e6d7c1bc987197704fcd32f5024e1043a08950d91c0482b8c" "de72e41e8df4029aac473dbd0ba5a51b0aca8b4f27cd71fc67eda197f9d146b6" | xxd -r -p | shasum -a 256

    Should print 76dde7cd482f236a0e6c83be6173705bd5114a5222b225bd32a05a19318416a2

  4. 4. Combine step 2

    The value you have goes first, then the published value.

    printf '01%s%s' "76dde7cd482f236a0e6c83be6173705bd5114a5222b225bd32a05a19318416a2" "c112e8612717a7f052b7a4aa8ba4c3650dd800dd421a822ad81d582a1f172412" | xxd -r -p | shasum -a 256

    Should print 5f8fd93d1342e6f582a2588d1c24ba86122827e4293e14743a5edbfb0c06c744

  5. 5. Combine step 3

    The published value goes first, then the value you have.

    printf '01%s%s' "6a9201a5fa622d9e3cfbfb0a4ba6051fc37c1c172f63aa6087bfb245df8b1320" "5f8fd93d1342e6f582a2588d1c24ba86122827e4293e14743a5edbfb0c06c744" | xxd -r -p | shasum -a 256

    Should print a21c8ba55f0fc6e57b545c6de25652a6b6edb54b52b930f491c0ed5edde1df08

  6. 6. Combine step 4

    The value you have goes first, then the published value.

    printf '01%s%s' "a21c8ba55f0fc6e57b545c6de25652a6b6edb54b52b930f491c0ed5edde1df08" "8680bcd982597baa59b5474438998fb2c932f4e7c4dc44c0962bfa4b522c7829" | xxd -r -p | shasum -a 256

    Should print d18600dbfb6bcb059d5c725341c007e642eceb0a8393d6b788c0fb7609a936ac

  7. 7. 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-sepolia.easscan.org/attestation/view/0xe9594f1c42a4ac3701b860a351cf04e831783def05460049c9572d205cc57f43

The rules these commands follow are written down in full, so anyone can reimplement them.

Read the specification