Alternative 4 is a band formed by Duncan Patterson, known for his work with Antimatter, Íon, and Anathema. The band's name is taken from the Anathema album Alternative 4, an album written largely by
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4522f346866adf0dad05e4ef7cd25634cda2bbf85233e8133eda174c0ba9ab55. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d86bbac4-0f54-488f-a6ea-73533b18d136.json and https://artists.proofprofile.net/proofs/artist/d86bbac4-0f54-488f-a6ea-73533b18d136.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).