Peter Roy Katin ( ) (14 November 193019 March 2015) was a British classical pianist and teacher. Biography Katin was born in London; his father was sign-painter Jerrold Katin (who was born in Lithuan
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 0x01604320bd0abd272a21d6a0221059aeaa9d2fe4c8961655bb206d136e011c1c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/133f6afb-5652-4b05-a340-799fe2a6e456.json and https://artists.proofprofile.net/proofs/artist/133f6afb-5652-4b05-a340-799fe2a6e456.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mendelssohn & Liszt: Capriccio Brillant, OP. 22 - Rondo Brillant, OP. 29 - Totentanz, S. 126 NO. 1
Dohnanyi: Nursery Variations; Liszt: Totentanz; Rachmaninov: Paganini Rhapsody
Rachmaninoff & Litolff: Piano Concerto NO. 1, OP. 1 - Piano Concerto NO. 2, OP. 18 - Concerto Symphonique NO. 4
Piano Concertos Nos. 1 & 2 of Mendelssohn
Peter Katin Plays Mendelssohn and Rachmaninov Concertos
Schumann: Piano Concerto & Franck: Variations Symphoniques (Transferred from the Original Everest Records Master Tapes)
The L Shaped Room (Original Soundtrack) [1962]
Nocturne No. 1 in B Flat Minor, Op. 9: No. 1
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 0x814e71ffad46296ae4d4a97ab7e45acbbee4b441ecaeaa469c800a3f043d0a6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAVQ1300596.
Nocturne No. 2 in E Flat Minor, Op. 9: No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4af31ce227bf237dd69f6c8d377754c4d000adfcbe7a9781abcbecc8420f6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAVQ1300597.
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 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
Schubert, F.: 3 Klavierstucke / 12 Valses Nobles / 6 Moments musicaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b7226cb04a34e8a3225de6d9aa17d36e8201e981f04ecdebe2373611d9eaa6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMNA1112504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18a200066478ed9dab357948d9c0020afc62fca585330a6438616a6760cc29f. 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/GBMNA1112507.
Mozart: The Complete Piano Sonatas - Peter Katin
Franz Schubert: Piano Sonatas, D 537 & D 960
Schumann: Concerto in A Minor - Franck: Variations
Petites Litanes De Jesus (Little Litany For Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b203f17884b4aa0eed7a6ead421f85b850dd6ae6de777f22cb01143a2c5651. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NOFZS5834080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00577fab23cfdfa1029148af22fdf5a77f107288e9ce831e9910579b77959bb9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOFZS5834290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb322bdb8110b75b01c1209e2122bbad8b2671a6b4e2f826764770a5f6d87bb07. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOFZS5834160.
Mendelssohn: Piano Concertos Nos. 1 & 2; Capriccio Brillant; Rondo Brillant
Nocturnes: No. 1 in B Flat Minor, Op. 9, No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef3402020ffb60545fb576c6c9e96d3d9515ed0d8d16524c30011b71aae49b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA561240184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4e0a1c98ed25adbc7d4dbb24c3ff3c5f04d2630f565b575ec1aa618a1c6101. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAET9235900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7550059562691be449a4713888434732dc64d278fec1e2c0a678da0a727923fd. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBAET9235800.
Saint-Saëns: Le carnaval des animaux, R 125: VII. Aquarium
Scottish National Orchestra/Peter Katin/Philip Fowke/Sir Alexander Gibson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463af2ec73bf021eb455cd55e2ce7a4392a83d92f7fdba9cad2057d8e6e493f6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBAYD9100255.