thumb|Portrait of Felix Arndt from the Library of Congress thumb|200px|right|"Nola" sheet music cover Felix Arndt (May 20, 1889October 16, 1918) was an American pianist and composer of popular 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ebf7c66b6fbcfbbd5e8c862d95138d443f33ac1c63bd18856cc13fe68b8dc3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08c61694-d26b-4b95-942e-c1b7d11f2413.json and https://artists.proofprofile.net/proofs/artist/08c61694-d26b-4b95-942e-c1b7d11f2413.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paraphrase. Opera and Ballet Piano Transcriptions. Visions from the Golden Age
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 0x917ebeda91d5ba823f195b08e98464259adefc5189c3544ce8095aa39c00b97a. 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/MX2831301577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05647334436b26df35ca14fa0ffe26e0078562bff681fb1d5f9545acc229c4be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/MX2831301579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16171bf382223e9b7f5ab2cac7dafcf2dd6ff52798d1b6563813e017328696bb. 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/GBAJY9806705.
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Symphony No. 5½ "A Symphony for Fun": I. Perpetual Emotion
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Symphony No. 5½ "A Symphony for Fun": II. Spiritual?
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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
Classical Music to Lift Your Spirits Vol. 2
Peer Gynt Suite No. 1, Op. 46: I. Morning Mood
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Love Me Sweet - Arr. for Oboe by Carl Vine
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Wedding Day at Troldhaugen, Op. 65 No. 6
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On the Beautiful Blue Danube – Waltz, Op. 314 - Excerpt
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Brandenburg Concerto No. 5 in D Major, BWV 1050: III. Allegro
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The Planets, Op. 32: IV. Jupiter, the Bringer of Jollity
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Spartacus Suite No. 2: Adagio of Spartacus and Phrygia
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802200c30fe40fb70c476f159de8c53294762f38605ff0ca087abca955f46388. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUAB02150010.
Nola - Arr. for Guitar Quartet by Timothy Kain
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Zephrys. Piano Evocations from the Golden Age
Murmuring Zephyrs. (Murmelndes Luftchen) Op. 21, No .4 - Duca 10
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Le Vent Dans La Plaine. Debussy, Beethoven, Mozart and Legacy.
'The Golden Age of Light Music: British Cinema and Theatre Orchestras
Alouettes. Piano Revelations from the Golden Age
Lyrische Stucke, Op. 43: No. 4, Voeglein Birdling (Little Bird) - Welte-Mignon 1277
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Kleine Suite, Op. 18: No. 3, Scherzo Humoristique - Duo-Art 5788
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d67ca957077dbe6b90cec4947322f0e3415ad8b321ab39b18fae16b58ed3fe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEPI82321768.
Am Stillen Herd. Opera Transcriptions from the Golden Age
Canadian Sunset / Soir sur le Mont Blanc
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They Call the Wind Maria (From "Paint Your Wagon")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68dfd1fae0b0b0e1d2e8dc9cc676df33cd3786c24aba9ff457ceb90ebabfb44b. 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/USRDG0223336.
Always Look On the Bright Side of Life (From "Life of Brian")
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DORSEY, Tommy: Music Maestro, Please (1935-1939)
Calliope Music and Arrangements - Wagner, J.F. / Sousa, J.P. / Abrahams, M. / Massey, G. / Arndt, F. / Bowman, E. (Circus Music for Calliope)
Dixie - Yankie Doodle - Oh! Susanna - Old South Cake Walk - Hot Time In the Old Town Tonight
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524730290de44b83cb2f09b0665a0340af50a16020e15ad0ff60eed5cdf7bb4a. 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/USB8U1003561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996079a7276c80b8d08dd960fe48bb47038e8b4df9b8f265164b7aa2f6c168da. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USB8U1003563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc696c9b6bb2375210bcffd78179cc252a615e5e3c7beaacf305864c59b8ad3. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USB8U1003556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f845a0d19aa8cfd1ad7843a52ffe4b5914a3fb76c5d7fafe23b3ce66c6b90a. 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/USSM15300389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cfdcd6a7fff3aac9350af38be136a31fe461d6ef7f19917605b5e741b90acc. 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/USSM15300401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e875969106465e496d1242f650e63cc208e42f7dcd429ff30ce012832416a1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USSM10411136.
Die Loreley. Piano Music by Beethoven, Liszt and Scriabin
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Piano Pour Films Muets - Music For Silent Movies Vol.3
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I'll Dance Till De Sun Breaks Through: Ragtime, Cakewalks And Stomps