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

Block 18712

Hash
0000003ab6309ef45a8fc92a3b7c48ee094048ae71483ec25c7053f088e5dcfb
Confirmations
23204
Time
2026-10-09 16:38:05 UTC
Median time
2026-10-09 16:29:24 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
d5fad8f2cebf2b8bc22d387b53163eb0a0426f8137ef636613364f67be8044c2
Previous block
000000ec1cfbe95be3b71d338b775fd394761f166917ed32dc11f414f7e93425
Next block
000000d54c6c5fa15ceb618a988dfc6eced9326ae1b9f36e652e2a7d936d1dc9

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 18712 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
cced2bf6eeb33025c71390a89c8276d4… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
d5fad8f2cebf…4f67be8044c2 coinbase1250