Marianna Prjevalskaya (born 1982 in Chişinău) is a Russian concert pianist and a naturalized Spanish citizen, having settled in A Coruña in 1992. Education Born to a musical family, Prjevalskaya be
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 0x0fdf907cd61807db7a0695468e5092ea8738ad191c1d825997da44b05bd401b9. Chain 2 (Bitcoin): anchored in block 953976 (2026-06-16T16:55:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bb665d9-0ef7-40e1-a5c0-c5a60103abf4.json and https://artists.proofprofile.net/proofs/artist/2bb665d9-0ef7-40e1-a5c0-c5a60103abf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).