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 0x5f11994df741f2cac14f4039561ad17d079be7630fc53b2b185dca4367c73912. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58b1cd90-7d6e-4e1a-a3c1-3e66c4c08103.json and https://artists.proofprofile.net/proofs/artist/58b1cd90-7d6e-4e1a-a3c1-3e66c4c08103.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x0e4e4786093b15ef590ec4d6de6c162fc9f7051fb443219f6b2d7ac12dcbb92a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda46fa1543891feba04dafe1dc88f2c77d8988f96979e8a2c99878b538561ffb. 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/HKI199283005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d944d5afeaec52f2bf3ec35665129d06e275d3081f042b8554af51a11a3a3. 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/HKI199283025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3268f9475480b11afcbf61ee41d7ac310765f49d8f7e2f7ce53688fbd8734b7. 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/HKI199283002.
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 0x202a60f889bd34360552485750b86c0961ceec5526f00042085dde1377e3a109. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKI199283004.
Carmina Burana: Chramer, gip die varwe mir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8910a951fee6653136e0520d5699b34ed5c21a8c02d877453bfdb1422d53b0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199283008.
12 Hours of Christmas - A Day of Classical Christmas Music
Keyboard Concerto in F Minor, BWV 1056: Harpsichord Concerto in F Minor, BWV 1056: II. Larghetto (Lara Croft: Tomb Raider)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446af539f85d48a111f24e1ba92b6b4b36e514900abfcc544769cb37f5de0762. 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/HKI199279502.
12 Hours of Christmas: A Day of Classical Christmas Music
Rejcha: Lenore, 3 Fugues for Chorus, Harmonie der Sphären
Ryba: Czech Christmas Mass / Missa Pastoralis
Czech Christmas Mass, "Hail, Master!": Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d9190c772c7fa156e31d9a0d7245d71bd22d2053c83e4dab13d80523ef642d. 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/HKI199824201.
Czech Christmas Mass, "Hail, Master!": Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051dcd11ac9e8ffe9ffeb08002e5ae1b3ff9e05fbf0215e17a3eb6074f869d95. 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/HKI199824202.
Czech Christmas Mass, "Hail, Master!": Graduale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81177c784c8128a2a5be2d89769306c97e29d124e5c49042bd1ae5eb99be80e6. 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/HKI199824203.
Czech Christmas Mass, "Hail, Master!": Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ae4b3faa31d8daff75dcf65a781d6c84eae746cfdd62e9a197de416ead9e4f. 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/HKI199824206.
Czech Christmas Mass, "Hail, Master!": Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f337f147ec9c7250a722b3d9272d3b96277f21e06c85b92b77f1f711756dc3. 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/HKI199824208.
Czech Christmas Mass, "Hail, Master!": Zaver (Final Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c9d8322a4bcfdfbcda5d513e592013be395cded3973156abcb7b43b806bf94. 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/HKI199824209.
Czech Christmas Mass, "Hail, Master!": Offertorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a3491199cd0e8fa360d1bce631a8722e64cc3d7fbd28f02ef4f7d1de6fc8da. 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/HKI199824205.
Czech Christmas Mass, "Hail, Master!": Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad46966ebc76666d15b3e06ba19c63ef74800a034e46304b1d5da1886675bd9. 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/HKI199824207.
Missa pastoralis bohemica, "Hej, mistre", (Hail, master!): Dona nobis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb5eadb5433c9b1740183786959fc7552bdd818f1233708908afda3d4469b72. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/HKI199824218.
12 Часов Рождества: День Классической Рождественской Музыки
Zelenka: Missa in D, Responsoria pro hebdomada sancta
Frère André, un homme de prière: musique pour la réflexion et la méditation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc0987bf6a318b7d3f199ed132ce23873a6816ce26675be10d821d34e8e5d3. 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/CADC41412234.
Artophaeus, Černohorský, Vaňura: Music at Prague's Saint James Church
Laut verkünde unsre Freude. Cantata for Two Tenors, Bass, Male Chorus and Orchestra in C Major, K. 623: II. Arie. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120bd9487a5b7244c4e562097bd7cf9cb4a762e0e7b35b7c9a78a624329c13bf. 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/CZA169402235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604afaff7b0fcba895331942fc060d3352e4484197f2fc119d2211a06ca43116. 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/CZA169400236.
Maurerische Trauermusik in C Minor, K. 477
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b457db872f5094ea16ac9ac172a283e215d16b6205716dd5f56b2fe9604ee9. 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/CZA160503489.
Laut verkünde unsre Freude. Cantata for Two Tenors, Bass, Male Chorus and Orchestra in C Major, K. 623: I. Chor. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aea4ed4a1d678b2e3ee9e335c2c07694b7a2378727d1fb56313e9b7221509e1. 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/CZA169401235.
Lobegesang auf die feierliche Johannisloge in D Major, K. 148
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503e60c21310c9882d80bab1ab516a5906d9133cb247801c10ef75a7c15d0018. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA169400237.
Zerfliesset heut', geliebte Brüder in B-Flat Major, K. 483
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45060d8eaf525525b00957b2b5f7fb639f5503b6df07f36edac07ef0870dced7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CZA169400239.
Symphony No. 1 in D Minor, "The Gothic": Part 1: I Allegro assai: section 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f5e666c8aa07b136b92677f7e323d0f441f7ee9e6260ec741e2844d46eefe2. 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/HKI190407902.
Symphony No. 1 in D Minor, "The Gothic": Part 1: I Allegro assai: section 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13311d630bfe6ac44b799ddafa923726acdb7802521443c53c5f9532fa21a19. 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/HKI190407904.
Symphony No. 1 in D Minor, "The Gothic": Part 1: II. Lento espressivo e solenne: section 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99e4f61f9dbbcbb62c35372cbffd00f61f083294bcb8ec728fff517ce5ab2c1. 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/HKI190407905.
Symphony No. 1 in D Minor, "The Gothic": Part 1: II. Lento espressivo e solenne: section 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf5c11947648cb402c473415754d31a65726a0d24485dd57f5d0ec6f70718ce. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI190407906.
Symphony No. 1 in D Minor, "The Gothic": Part 1: II. Lento espressivo e solenne: section 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e66959c5a225e241a6630e61b4d35237e03997ead14f2c36fdf563da79d957. 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/HKI190407907.
Symphony No. 1 in D Minor, "The Gothic": Part 1: I Allegro assai: section 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b88ad2abfb7df2ceb69dbc12a023dc1adc559b2f839b965fb478ff20cbafea5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/HKI190407901.
Symphony No. 1 in D Minor, "The Gothic": Part 1: I Allegro assai: section 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03e62a12e2b9affcbda92aa164c7cff86d766f1abdb9c3a3b630795e7986ac9. 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/HKI190407903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23133bd191549af3a4510051b54401411e38704ed8b3b9c3265d1f57a3ff7839. 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/CZA160417044.
Janacek: Glagolitic Mass - The Eternal Gospel
Martinů: Opening of the Wells, Legend of the Smoke from Potato Fires, Mikeš of the Mountains
Romeo and Juliet Suite No. 2, Op. 64ter: I. Montagues and Capulets
Slovak State Philharmonic Orchestra, Kosice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178df477b4490f104a265950ae653a4cad9157a286d7d8f5fcf64296edd413b6. 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/HKI199286508.
Requiem. Missa pro defunctis: Sequentia. Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02e7e8351259f3d47052cff9f126a60cb8593d1dcf60f2e36ad9649022c9ec1. 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/CZA168905270.
Requiem. Missa pro defunctis: Sequentia. Rex tremendae majestatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37de4adf635bed1cb8b0617114c9635a576fb3284415b26a1f55c3cab1b43293. 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/CZA168908270.
Kühn Mixed Choir, Pavel Kühn (Felix, Matěj, Blatný, Vycpálek)
Collana Musica sacra classica: Tu le sais bien, bon Dieu