Heidi Parviainen (born 8 March 1979) is a Finnish singer. A classically trained lyric soprano, she is the lead vocalist of symphonic metal band Dark Sarah and previously fronted Amberian Dawn. Career
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 0x939899f8aa67b9cc2bc33ed878da40ea49f9a9f16ba1d4305d0586f244b68ff2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d6aca46-dc99-4935-80f2-c5efe5f6b056.json and https://artists.proofprofile.net/proofs/artist/8d6aca46-dc99-4935-80f2-c5efe5f6b056.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).