Dark Sermon was an American blackened death metal band from Tampa, Florida. The band was formed in 2009 under the name "In Reference to a Sinking Ship" and later changed their name to "Dark Sermon" in
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 0x0c298789576fe4dfcae4b8c9be8f517f606d70fcd1cf1f572a0431343538352a. 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/d0e0ccdf-ba2c-4872-ada0-55c31d28396c.json and https://artists.proofprofile.net/proofs/artist/d0e0ccdf-ba2c-4872-ada0-55c31d28396c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
In Each Hand, A Talisman of Sacred Stone