Audio Noir is the debut studio album by the English heavy metal band Bossk. It was recorded by Martin Ruffin at In Lieu of a Studio in Battle, East Sussex, and released via Deathwish Inc. on 1 April 2
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 0x215ab8bb3cffa80a952464bbbd0450f1a32c1bd2864d33d9094e8e5d9b0c99dc. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4e96627-d7c5-4c82-a2b6-d9a5bbe6f71c.json and https://artists.proofprofile.net/proofs/artist/b4e96627-d7c5-4c82-a2b6-d9a5bbe6f71c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).