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

Block 19739

Hash
000000c498dbbf747babaa04540356bcea7590f96e78d101fd1586edc19c7046
Confirmations
21968
Time
2026-10-10 21:27:11 UTC
Median time
2026-10-10 21:18:48 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ed3b48dea2ad00a921541baaf1331e7fc69160e8a4cad53cb07df0019ce093e7
Previous block
000001012d525128d9d8d80c09b66be50c54f468b08715ccd3eb017bea453c9f
Next block
0000007af020e046988bb406ad5c65b9c70ad449bc7f618fab4ab693980c5fa8

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 19739 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
d5c986ffe46edcae4fcc994afe4da1a9… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ed3b48dea2ad…f0019ce093e7 coinbase1250