Mariska Setiawan is an Indonesian soprano. She lives in Surabaya. Early life Mariska was born in Surabaya, Indonesia. She has participated in master classes in Indonesia and abroad, working with St
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 0x7be25f5982e11cfd986c538fb296ef469478ceea658bdf89d08851ffe9f4d114. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7001977-088a-4e88-bfaa-e9a0bf28af3e.json and https://artists.proofprofile.net/proofs/artist/a7001977-088a-4e88-bfaa-e9a0bf28af3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Satu / Lonely Girl Live from Studio Sangita