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

Block 19657

Hash
000000c62b2134a004aa6185b126acc3554d775717ce2ff77fb301eccef78aca
Confirmations
22565
Time
2026-10-10 19:07:53 UTC
Median time
2026-10-10 18:59:36 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c0ec57b1593fb053600b0d521692accc140a577c7f8c963b79416d29ab618c86
Previous block
0000009770028fae5e443cf5bd1922b6fee94e2197a77e5b94884a7328ad878d
Next block
0000008a5f546135387f3c6a24ac27bd3190afb32b0970710a988bc9b0951f35

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 19657 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
e0f30e815fed629c1a2fea34ef087285… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c0ec57b1593f…6d29ab618c86 coinbase1250