Holocausto Canibal (Portuguese for 'Cannibal Holocaust') is a Portuguese goregrind band based in Rio Tinto. Formed in 1997, the band has released one demo, six studio albums, three EPs, four splits, a
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 0x043ad669d6d3f0bb2ea922ba6121f3e2146becb3b79bcf8faaf1d1be33943103. Chain 2 (Bitcoin): anchored in block 953996 (2026-06-16T20:04:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3020df01-81dc-4717-b20b-071a1f1596c3.json and https://artists.proofprofile.net/proofs/artist/3020df01-81dc-4717-b20b-071a1f1596c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Sleep 'Til Trutnov (Live at Obscene Extreme)