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

Block 18657

Hash
000000f6adeda33f09bb37e9a253a22375fac4de5ffd01016f23d59204847535
Confirmations
23454
Time
2026-10-09 15:07:25 UTC
Median time
2026-10-09 14:58:47 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
90e2bb47f8583ddb6ba424f1f5641c6910a0c9a33ec88e16664624469020e3d8
Previous block
0000009a0fbaca9bc0e453c9ad060c4408182f9a14aaa61b053a325b2bda8d88
Next block
000000b03fd89b45d153f0f8b1c685afcf79acde3d457f01cbbb77ce66ff436c

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 18657 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
ea41a8ef9d13e8fc00e70f7010b5ea22… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
90e2bb47f858…24469020e3d8 coinbase1250