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

Block 18972

Hash
00000093e58e6cdc8ef58db4b78df048557344fe0f7df588947c39cdde172e32
Confirmations
22375
Time
2026-10-09 23:51:50 UTC
Median time
2026-10-09 23:43:09 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
cfc5b643ab6fe2d4fdd67eb5bf0b17f18f94013ae6c9198f81f53a1621fa2174
Previous block
000000c281277114f99704986850ee590069db5e0d61e29a9713ba25e785c27e
Next block
00000064a3e7a7aa0413dba00ecfe946a9309c443098560b271c6755ca2d78e7

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 18972 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
74124f7a6bba317a35120cad1e9e0a5d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
cfc5b643ab6f…3a1621fa2174 coinbase1250