Mortuus are a Swedish black/death metal band. History Mortuus recorded their eponymous 7” EP Mortuus which was released by The Ajna Offensive in 2005. The members “decided to put the project to death
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 0xc211793cb22e9766a981f7b1eedbe284a3d5d2236c6592ca76bdecb585f485f8. Chain 2 (Bitcoin): anchored in block 953911 (2026-06-16T08:03:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18c98094-583d-40fa-88c2-116dc9b3e2b2.json and https://artists.proofprofile.net/proofs/artist/18c98094-583d-40fa-88c2-116dc9b3e2b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Contemplanda Morte - De Reverencie Laboribus AC Adorationis