Visceral Bleeding was a death metal band from Sweden. Despite the band's Swedish nationality, Metal Hammer stated the opinion that the band's "brand of death metal just doesn’t sound that Swedish at
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b6ec709fdb38cc688fb37e74286381318f6858dc3ad86ae58405e2da8b5e1b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf971e49-b27b-4171-a695-dab8ab81159d.json and https://artists.proofprofile.net/proofs/artist/cf971e49-b27b-4171-a695-dab8ab81159d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).