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 0x0adbe71d6a350385b01742813a94a629214c71280fde373b7aa549408820891a. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15124bc1-8b41-42d0-b392-fd9da5375889.json and https://artists.proofprofile.net/proofs/artist/15124bc1-8b41-42d0-b392-fd9da5375889.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hanns Eisler: Orchestral Music, Vol. 2 - Kleine Sinfonie / 5 Orchestral Pieces / Scherzo / Rhapsodie / Winterschlacht-Suite / Wilhelm Tell
EISLER, H.: Orchestral Music, Vol. 1 - Suite Nos. 1-4 / Kammersinfonie / Der lange Marsch (Pommer, Rogner)
Beethoven: Symphony No. 3 "Eroica" & Leonore Overture No. 3
Anton Bruckner.: Symphony No. 4, "Romantic" (Berlin Radio Symphony, Rogner)
Schubert: Sinfonie E-Dur D 729/Sinfonische Fragmente
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 0x2269f85b6335e432d9caf3c0f474da0e0b62a9b30dbfcf93cbcdc311cbb6e028. 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/DES380401206.
Aram Khatchaturian: Masquerade Suite / Gayaneh / Mily Alexejewitsch Balakirew: King Lear (Guhl, Stein)
Nabucco, Act 3: Va, pensiero, sull'ali dorate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb685f736b5e571c2028bb281404e4c6a3b2e7c8ce5cfbe0d0b1700e5331d8d46. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DES380001838.
Dark Hours (Mystic Moments of Classical Music)
4 Elements - Classical Music of Fire, Water, Air and Earth
Händel: Water Music & Music for the Royal Fireworks (KulturSpiegel - Eterna - Über Grenzen hinaus)
Messiah, HWV 56: No. 42, Chorus "Hallelujah!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca54d8b5bd6d59be383536b66e5bcfa80f2b67b765f40477cfb643fecc17139. 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/DES380011704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460f7a62f62047c77081deb7bdc9857c545a5f31496b24bb833af78ba1a9bf2. 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/DES380011708.
Georg Friedrich Händel: Oratorio Choruses
Judas Maccabaeus, HWV 63 (Sung in German): Part III: Seht den Sieger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf0771aac17ea324d18776b7975932d2b6b5d7d0198c82917c07d89bf007e1c. 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/DES380006883.
Semele, HWV 58: Act II: Chorus: Now Love that everlasting boy invites (Sung in German)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670edd84dfce2916ede1c91507363faa752a2ecb985ffa6701ae16bfb556f168. 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/DES380006884.
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 0xeb89ca5f7bbaeb54e5783bb0ef666b7079e671e4057fa2ffdbca6810626e63c6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DES380006888.
L'Allegro, il Penseroso ed il Moderato, HWV 55: Part I: Aria: Haste thee, nymph
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d44770a9a944fd8d9223d017e6a81d5c1887c298719934ccfc1d8e14b6ebeab. 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/DES380006890.
Schweyk in the 2nd World War: Kälbermarsch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288bea0b28159d7fc1e2a1bdcb9930fcfc5bd3095097eace66ed413bd02c5c6. 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/DES380008923.
Georges Bizet: Arlesienne Suites Nos. 1 and 2 (L') / La jolie fille de Perth Suite / Jeux d'enfants [Berlin Radio Symphony, Rogner]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2da25b9a0d4c6fe08b9133261aa7540d2c20d27ce71bf3a9abdade519472059. 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/DES380007484.
L'Arlesienne Suite No. 2 (arr. E. Guirand): III. Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4926f298c8199c163e156b5670be125844dec6e3e59db02509cdf9f16ab4c7. 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/DES380007489.
L'Arlesienne Suite No. 2 (arr. E. Guirand): IV. Farandole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c02eca314bbcea2619de22304b1d764df950efd0322379c6f613c409be28cb. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380007490.
Discover Orchestral Spheres (Experience the 44 Most Spherical Symphonic Works)
Classical Music for Children, Vol. 2 - Kinderklassik
Concertino for Piano and Orchestra: II. Lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc290c70f88a6127e3de16de02866864d64abfa60d769f9b1f0b5688135025dce. 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/DES380019860.
Music in the GMBR, Vol II (Musik in der DDR, Vol II)
Stimmt an die Saiten (Choral music from the Nineteenth century)
Requiem in D Minor, K. 626: Lacrimosa: Larghetto
Solistenvereinigung des Berliner Rundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa3f19b33199235c4f447be90d1fd00ea11ed9a451ad56e3899f2d6bb2c98c2. 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/DES380811007.
Opera Arias (Soprano): Mozart / Offenbach / Strauss / Rossini / Bellini / Verdi / Gounod
Die Zauberflote (The Magic Flute), K. 620: Act II: Arie: Der Holle Rache kocht in meinem Herzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dcbf07621622b51950fa100098a7c738b305fe01fb34d930dc3fc472f00394. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380006897.
Vocal Recital: Suss, Reiner -Albert Lortzing / Domenico Cimarosa /Johann Adolf Hasse /Karl Ditters von Dittersdorf/ Georg Philipp Telemann (Comic Opera and Cantata Scenes)
Felix Mendelssohn Bartholdy: Piano Concertos Nos. 1, 2 (V. Gheorghiu, Leipzig Radio Symphony, Kegel) / Concerto for 2 Pianos [Lejskova, Lejsek, Rogner]
Paul Dessau: Orchestral Music, Vol. 2 - Symphony No. 2 / Symphonic Adaptation / Orchestermusik No. 3, "Lenin"
SIBELIUS, J.: Symphonies Nos. 4 and 6 / The Swan of Tuonela (Leipzig Radio Symphony, Kegel, Berlin Radio Symphony, Berglund)
Schostakowitsch: Symphony No. 1 & Piano Concerto No. 1
Eisler: Woodburry-Liederbuchlein / 5 Kinderlieder / Septet No. 1 / 9 Deutsche Volkslieder / 9 Kanons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08e0863fc91417a39df0b95e110cbe4404a15e551e636948444250cf4584f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DES380617048.
Foreign Lands (Classical Music for Children)