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 0xb07212dd51cca5b392327a600d454d33dcd24ff23744b3af7452cb57e06a4bf4. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f59d7a3b-2a5c-4c46-8ecb-18a370806cd8.json and https://artists.proofprofile.net/proofs/artist/f59d7a3b-2a5c-4c46-8ecb-18a370806cd8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Guitar Music - Nin-Culmell, J.M. / Fraser, M.K. / Constantinidis, Y. / Moreno, T.F. / Bartok , B. / Grieg, E.
Songs of the Hebrides (arr. P. Galbraith): The Rune of Columcill (Columba of Iona)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c82fd40918044e956aca74f1363c65f75e7b27cbe41f56abd8a08388250a39d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0823610 — a six-check JSON result.
Aires de La Mancha (arr. P. Galbraith): No. 4. Ya Llega el Invierno (Winter Is Upon Us)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21660792120276b0c4a432c9f67d382d004eb6a0ec9c7f60a90ebff540861dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0823631 — a six-check JSON result.
Papaïoannou: 24 Préludes pour piano - Constantinidis: 8 Danses des îles grecques - Levidis: Erste griechische romantische Sonate
Matthew Koumis plays piano music of Yannis Constantinidis
George Hadjinikos Interprets Greek an Foreign Composers, Vol. 2: Yannis Constantinidis
Topos: 20th-Century Greek Orchestral Music
Dodecanesian Suite No. 1: I. Andante sostenuto - Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af06a7476287916e7f8885df12d8dbd900953517965b7ec0f2828db375a55c7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241505 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791ce6726628960c5664a28cb56785686c1766005fb6aef8dc6975c7f0856be5. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241506 — a six-check JSON result.
Dodecanesian Suite No. 1: III. Allegro piacevole - Vivo e giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0a464e960fef4fb943c1f6fad190151d4ec4d85e9207ecb8442279f033610f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241507 — a six-check JSON result.
Dodecanesian Suite No. 1: IV. Andante mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b6d4076ef7b71bd9b06752b71dd48028ec6676ec4cb6b9d71dc9c834186ea3. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241508 — a six-check JSON result.
Dodecanesian Suite No. 1: V. Andantino quasi parlando - Allegretto semplice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf419ec14c2df7d2afa48a3809d58f007339f60cb6d1f7b58f7247175158dd47. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241509 — a six-check JSON result.
Dodecanesian Suite No. 1: VI. Andante lento - Allegro vivo ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772eac015e0166587e621b403f24eb7abb71822a6d75138dddd4d50c59393833. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241510 — a six-check JSON result.
Dodecanesian Suite No. 2: VI. Finale. Moderato quasi narrativo - Allegretto scherzando - Allegro feroce ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa1abf291b26d67a0937bc775385c691ff0bde27ef98d7becb5608d458f7f8e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241516 — a six-check JSON result.
5 Greek Dances, AK 11b (Arr. for String Orchestra by Walter Goehr and Nikos Skalkottas): No. 1, Epirotikos. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73ab28e0db7f50ae6d8d50c1768cdab96c42832d1a0cc2f87c939cd6553d3fe. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241517 — a six-check JSON result.
5 Greek Dances, AK 11b (Arr. for String Orchestra by Walter Goehr and Nikos Skalkottas): No. 2, Kretikos. Allegretto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c220b857f90187e6b677364f3326fd1d56f7776e8493092588b25e3fe2de07. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241518 — a six-check JSON result.
5 Greek Dances, AK 11b (Arr. for String Orchestra by Walter Goehr and Nikos Skalkottas): No. 3, Tsamikos. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3192191cda334cb8aadea211618d6cadba961fe7d43f1c1da7ce3ff74e0eb569. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241519 — a six-check JSON result.
5 Greek Dances, AK 11b (Arr. for String Orchestra by Walter Goehr and Nikos Skalkottas): No. 4, Arkadikos. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39f18037806a0fbe0e2fbe36953da2886662a9ab635f9ba02ddef61852bd21. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241520 — a six-check JSON result.
5 Greek Dances, AK 11b (Arr. for String Orchestra by Walter Goehr and Nikos Skalkottas): No. 5, Kleftikos. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c08e5592fa12ff82b21688944b548ae35403647d418a67c5f007a0fe9f4be0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192241521 — a six-check JSON result.
Rhapsody: 20th Century Violin Masterpieces
Bridges: Works for Violin and Piano by Greek composers
Athina Poullidou Plays Music of Constantinidis & Skalkottas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a71119a88cb32dfb0843376d0ff696ee17dc0aaa844dd7714fa55fee08b1f92. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBFG1550122 — a six-check JSON result.
Karkoff, Skalkottas, Blomberg, Constantinidis & Magnusson: Piano Works