Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19636

Hash
000000f00721a6bf9c12c33142a6ad0aa04ecda245845aae260b6a333434d6a4
Confirmations
22661
Time
2026-10-10 18:32:48 UTC
Median time
2026-10-10 18:24:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
594502654385d631b3c2e9746961156e92ccb5e7f737889b84b6720c594e5736
Previous block
0000008c4af1497e2bc66153bdb078a22da63fe520f7a54a126784b333eb8777
Next block
0000003effe593a835e285c9b5d427fe06e7aaa8ffe03f91df452c0b6f3ea2a3

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 19636 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
3971c7448402bac0559a2221bb99aa65… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
594502654385…720c594e5736 coinbase1250