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

Block 18661

Hash
0000003752002a447c14985dbb481b80f5371088c7d4ad0bd2fc5c06f456a6c6
Confirmations
23459
Time
2026-10-09 15:13:53 UTC
Median time
2026-10-09 15:05:44 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
83c70a72f8ae9c1e15f0dfc5d911b6bd4966e33629a9100d369858cd275029f6
Previous block
0000005ca390add5f132dbd19c12c3cd0b5dac0d7185c7cba623383c8178b9e4
Next block
0000011acb0fad4aba22b504da2c7d615587088705575b690b3267ff6b0281f6

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 18661 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
926c7311cc9bbbba52c0f8aa627fe00c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
83c70a72f8ae…58cd275029f6 coinbase1250