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

Block 18631

Hash
0000007c7ce2b55e8bea259d87118de43bf1c96f2063418b3604ef2cb54db4c7
Confirmations
22479
Time
2026-10-09 14:24:47 UTC
Median time
2026-10-09 14:16:33 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
190487f9514d10958c7992db56095eb11eab8111dba280e70cb164f2fa5deb02
Previous block
000001085522d6038738d8ccde3a90d9a7cb9f03337b3515d3417a20dd9b12f8
Next block
0000007fda733417e65cbc058a9e187dabb1af97f5e38646e192b32bb9d33e69

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 18631 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
7d46584d661ec49cec94669fd5fd4268… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
190487f9514d…64f2fa5deb02 coinbase1250