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

Block 19646

Hash
000000793a1eb315f7726ed8962553d972992e56dde16368873057044b035973
Confirmations
22615
Time
2026-10-10 18:49:48 UTC
Median time
2026-10-10 18:40:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
4e48bd0d1481c6df2d8a6f581a90aebe7079fc65c26ebcd24cb74340cb62c3e7
Previous block
000000e3a5525434568d1d12234ad0fbdcbab272434ec5e7c1402ffde28a4cf7
Next block
00000102210ee3e7a7b97a79c15cdb0818508e9d990c88a129cb6afd6ce98777

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 19646 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
30df5a4edb2f5617e02d946ab5fdabfe… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
4e48bd0d1481…4340cb62c3e7 coinbase1250