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

Block 18871

Hash
00000103d5a36fe309b812828b5e5b10b9bce603d2fddbbf7a09cc613ca392ae
Confirmations
23348
Time
2026-10-09 21:01:26 UTC
Median time
2026-10-09 20:53:21 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
56e32bfe4017c09ad3a70bde1bbf60cbffa8d598376b99530bdf96086587d663
Previous block
00000059bf9c04229e768462ce1d58de4f529254ddd36b51b3eab0051b4bc42e
Next block
000000ffedef1f60c227013d7990193b72000f64914b84342094f925fa3258b5

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 18871 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
3dcf7e978c9fbc36d8766d9b83cd8e6d… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
56e32bfe4017…96086587d663 coinbase1250