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 0xa87c845a3ac3709ae99ae5fd1e8002743975b2cebb8fd728d3f9d98ac7d16f36. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e2a6841-252b-4b48-a2e9-662a59ab3c5d.json and https://artists.proofprofile.net/proofs/artist/3e2a6841-252b-4b48-a2e9-662a59ab3c5d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pergolesi: Stabat mater - Salve Regina - Orfeo
Requiem in D Minor, K. 626: Sequence: I. Dies irae
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 0xb4978068ce233771d3c9434f04051a0d488af637730e291272d5b1ea99234838. 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/USB8U1602112.
Missa Papae Marcelli: Masses, Book 2: Missa Papae Marcelli: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e3a53a33f3982a7fa3ea27cf4b3b50ef9c615404808b36f849911e39e5756. 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/USB8U1602138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179be90e9193bbf7a048147ea3ede8bab1a5751795decf64ef5e1c0cebb9631d. 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/USB8U1602114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d6dd3fc6abe42fb5e8beafc236fe4987cd837ed22afeec954f0b04c014f082. 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/USB8U1602121.
Classic Moods - Pergolesi, G.B. / Bach, J.S. / Handel, G.F. / Bach, C.P.E. / Mozart, W.A. / Haydn, F.J. / Donizetti, G. / Mendelssohn, Felix
Haydn: Die sieben letzten Worte unseres Erlösers am Kreuze
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 1, Introduzione. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3577cb88d1b4037b1b4872b6162e2736f94c5b167cf44739bfbce8d961d015. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1763786.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 2, I. Vater vergieb Ihnen. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89adb0ca5e47126fa73cfa934fc9871256c0dbf3c7dcea0b06198d07827a14ad. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR10S1763787.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 3, II. Fürwahr ich sage dir. Grave e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3020076128d4207e03f55f1845d6c5f2ac156d96e031b34d65cb0672cac174a8. 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/FR10S1763788.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 4, III. Frau hier siehe deinen Sohn. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf951d87d989b7bceaa0847e9e4b6541e31c9f9fc201a720274509fecb00e41f0. 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/FR10S1763789.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 5, IV. Mein Gott, mein Gott, warum hast du micht verlassen. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39f80cad63ed314827dbbf0af313a4b3083da70ccfa04a01b69cd9c4a1f1c7. 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/FR10S1763790.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 8, VI. Es ist vollbracht. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da0e369c9e1e50366069a0a54a563df687a178ff5b6b88fd1a6b1664eac2b02. 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/FR10S1763793.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 9, VII. Vater in deine Hände empfehle. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96714085a89c20a508ccdfd7bf8006b632e9919c60ed22aaf3a0a1230c85f6ec. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR10S1763794.
Die sieben letzten Worte unseres Erlösers am Kreuze, Hob. XX/2: No. 10, Il Terremoto. Presto e con tutta la forza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c52fca04f17592edf4373768f41666ba844aea284f3a8468b879e4f35af3c8a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1763795.
Choral Music - Bortniansky, D. / Schubert, F. / Bruckner, A. / Bruch, M. / Mendelssohn, Felix / Silcher, F. / Rheinberger, J.G.
SWR Sinfonieorchester des Südwestrundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718b62593b5c265d8b74a936827827859d666e916e457770d71655e5cefdc92d. 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/HKI190533301.
La Cenerentola, Act 1: No no no. Non v'è (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a235868fb0ca0999b61c2d468ca06387ebf66c7f5b7f930f2c22f23179285. 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/HKI190533302.
La Cenerentola, Act 1: Scegli la sposa - Come un'ape ne' giorni d'aprile (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa5fc2d0159991a3672b30d4da4700803368b171e7dfcbcf4a214cda06caa1b. 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/HKI190533308.
La Cenerentola, Act 1: Signore, una parola (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05569fc4b5e2a787bc422e12124886408ce13a5cb58be0b034910c437dd85ea8. 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/HKI190533310.
Jommelli: Didone abbandonata (3rd Version)
Don Giovanni, K. 527: Don Giovanni, a cenar teco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afef0235eb8f5eeae03071e5df1faebb1b83d3c79f57a961b3f5c394d06614b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612272.
Choral Music (Ave Maria Choruses) - Bach, J.S. / Gounod, C.-F. / Mendelssohn, Felix / Schubert, F. / Bruckner, A. / Pergolesi, G.B.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c0a5486c5ce33566591204a1ec620bf5842f7529be3fe51b945a128a293f2d. 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/US2TL0919101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf134f9dda589107472c57a8b3ef280d0ba47f6f52bfbca933c35e66742b6a778. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEB261201585.
The History of German Music (100 Famous Songs)
Goethe And Music, Vol. 1 - Beethoven, L. Van / Mendelssohn, Felix / Gounod, C.-F. / Berlioz, H. / Massenet, J. / Mahler, G. / Spohr, L. / Boito. A
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253fdda085497cb0ed8e51d46bfb44814e72a0f12463375960a59189bb6bce78. 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/US2TL0931201.
Meeresstille und gluckliche Fahrt (Calm Sea and Prosperous Voyage), Op. 27
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82efe4324923ebf9a86a148c8d714246be256a32785a445ae3cc2a6c94075eca. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US2TL0931202.
Faust: Faust, Act I: Le veau d'or est toujours debout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d16c1b353ca52151551289ab2f4fb1bb09767742a73097849687a0879e18eb. 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/US2TL0931203.
La damnation de Faust, Op. 24, Part II: Ballet des syphes (Dance of the Spirits)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3775d54df99a8bf054852380e9ec83b50fbb4a7a2b77d2a90b5f607565b8f5f3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0931207.
Exsultate jubilate: Dix siècles de musique sacrée
Stimmt an die Saiten (Choral music from the Nineteenth century)
Mendelssohn, Felix / Schumann, R. / Reger, M.: Duets
6 Zweistimmige Lieder, Op. 63: No. 1. Ich wollt' meine Lieb'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aec0a870af1fa711fbe13a0816ec955eb52eb9d30432518e0e3dbb49147780. 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/USB8U1012256.
6 Zweistimmige Lieder, Op. 63: No. 2. Abschiedslied der Zugvogel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b869d2c5c2e03fb52dfa53ae48f483d6162ee1000ec07984bf87aedd881bf9. 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/USB8U1012257.
6 Zweistimmige Lieder, Op. 63: No. 4. Herbstlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c379ca9609a057c2e86c3632b33f2e8de9036a971bbad9196dc7548e18279d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USB8U1012259.
6 Zweistimmige Lieder, Op. 63: No. 6. Maiglockchen und die Blumelein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321b2f18e3ac3ca8a6065fca761e853862c1cbe55bc8159e670c833d5c1ce948. 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/USB8U1012261.
3 Zweistimmige Lieder, Op. 43: No. 1. Wenn ich ein Voglein war
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed3642e9d7a02b36e6e1d7f53933f30377b41779d54cc956d6a0765f22dc9f2. 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/USB8U1012269.
3 Zweistimmige Lieder, Op. 43: No. 2. Herbstlied
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa8e5f2d371c049bc30c08508d9a073113d040ebdd9c8400215a558bb97e0d5. 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/USB8U1012270.
Strauss, R.: Orchestral Music / Opera Excerpts (Jubilee Edition)
Donizetti, G.: Parafrasi Del Christus / Pergolesi, G.B.: Salve Regina in C Minor / Bonporti, F.A.: Mittite Dulces / Telemann, G.P.: Was Ist Das Herz?