Boris Alexandrovich Tchaikovsky (; 10 September 1925 – 7 February 1996), PAU, was a Soviet and Russian composer, born in Moscow, whose oeuvre includes orchestral works, chamber music, and film music.
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 0x57bf6eb34d1f1d762ae556a028e930368989d035e43a0aef30f642a3c05e205a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54152370-de2f-480e-bbdd-202128b4340d.json and https://artists.proofprofile.net/proofs/artist/54152370-de2f-480e-bbdd-202128b4340d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
B. Tchaikovsky: Piano Trio, Cello Sonata & Solo Cello Suite
Boris Tchaikovsky: Piano Quintet & The War Suite
B. Tchaikovsky: Violin Concerto - Violin Sonata
Tchaikovsky: Chamber Symphony - Signs of the Zodiac - 4 Preludes for Chamber Orchestra - Clarinet Concerto
Tchaikovsky: Symphony No. 2 - Piano Pieces
Tchaikovsky, B.: 4 Poems by Joseph Brodsky / From Kipling / String Trio / 2 Poems by Mikhail Lermontov / Lyrics of Pushkin
Tchaikovsky, B.: Symphony No. 1 / the Murmuring Forest Suite / After the Ball Suite
Tchaikovsky, B.: Piano Concerto / Clarinet Concerto / Signs of the Zodiac
Boris Tchaikovsky: Chamber Symphony; Sinfonietta etc.
Tchaikovsky, Boris: Cello Concerto, Suite & Partita (The Russian Years)