Silentium is a Finnish gothic metal band. The band was formed in 1995 and it originates from Jämsänkoski, Finland. Keyboardist Sami Boman and original vocalist Matti Aikio created Silentium by adding
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 0x066ab9af58dba758e5fcf9df007a4cdddc1263ecbf41ca9f7478cd69ee040b9d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc4604f7-bb7a-4f68-8c70-976089a94705.json and https://artists.proofprofile.net/proofs/artist/fc4604f7-bb7a-4f68-8c70-976089a94705.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).