Anna Borysivna Korsun (; []; born 15 February 1991), known professionally as Maruv (stylized in all caps), is a Ukrainian singer. She used to be part of the band of the same name, the successor of t
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 0x6b915702fd678ce96f4b5ea741e4050855af59101410230b47b646020cc64ceb. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47fea1d1-7f82-4b7c-a583-9be78422b568.json and https://artists.proofprofile.net/proofs/artist/47fea1d1-7f82-4b7c-a583-9be78422b568.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).