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 0x63ac6f4e8114f73cf85243d4412756c469ce0f9edd0c2a858ef6c435e06e2a8c. 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/87da90e3-37e7-4664-b5ad-dbc71d4c3281.json and https://artists.proofprofile.net/proofs/artist/87da90e3-37e7-4664-b5ad-dbc71d4c3281.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Berezovsky: Liturgy, Eucharistic Verses, Let the Lord Enthrone
Berezovsky: The Ukrainian Sacred Music of the 18th Century for Choir a Capella
Berezovsky: A Musical Anthology of Works / Березовський: звукова антологія творчості