Witold Małcużyński (August 10, 1914 – July 17, 1977) was a Polish pianist who specialized in the works of Frédéric Chopin. Biography Małcużyński was born in 1914 in Koziczyn (Congress Poland, Russian
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 0x939cd3b74079caa4af71a6975567b271ac233d735979ca877c3daa84a1bb9fde. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34939cfa-454d-4063-a243-2793a8d6d8c5.json and https://artists.proofprofile.net/proofs/artist/34939cfa-454d-4063-a243-2793a8d6d8c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Sonate pour piano No. 23 "Appassionata" - Bach: Fantaisie chromatique et fugue, BWV 903 - Brahms: Intermezzo, Op. 118 No. 6 (Mono Version)
Franck: Prélude, Choral et Fugue - Liszt: Rapsodie espagnole (Mono Version)
Witold Malcuzynski with the Philharmonia Orchestra Conducted by Paul Kletzki - 1946-1949
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7848bf1b08020e48b5135360fbc12c59435cb9463ca56aef0442505e7080077. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC5900084.