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 0x0a575e6aed64c993feb115280a1c67481b47dd11f503f8cc54e2fe179f7254e5. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a44fe844-97c7-4fc3-af1c-056a91b390ac.json and https://artists.proofprofile.net/proofs/artist/a44fe844-97c7-4fc3-af1c-056a91b390ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peter Schreier: Best Recordings of All Time
Strauss: Der Rosenkavalier (Mono Version)
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 0x8262a203e1cca8235697857c980f6499a4768e3f805a879fbff2b23e46d07820. 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/DEF058603930.
Euryanthe, Act I: No. 2. Romanze "Unter blüh'nden Mandelbäumen" (Adolar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb829f90d672f1c878f734336694390854459cd726ff1fc05c0160c2bc544d26. 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/NLY331305896.
Euryanthe, Act II: No. 10. Szene und Arie "Wo berg' ich mich?" - "Schweigt, glüh'nden Sehnens wilde Triebe" (Lysiart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4615a396e2033ca0be76e060fdd0f78303eb1258a32e048f04f4befe31d8fb. 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/NLY331305907.
Euryanthe, Act I: No. 9. Finale "Fröhliche Klänge, Tänze, Gesänge" (Euryanthe, Chor, Eglantine, Rudolf, Lysiart)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143bc2b11fa19da652a8a37365beb1af0d300292b179fb22835ab0bf59f28014. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331305906.
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
The Gypsy Princess, Act 2: Tanzwalzer. Erstrahlen die Lichter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272bcc116aed04ca977b65afe9fbfa545a85854c6f2eb825899a51ddb449048. 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/DES380002560.
The Gypsy Princess, Act 2: Duett. Mädel guck (Das ist die Liebe, die dumme Liebe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb8eacc9275b7fef62e64b6ae935342e0554fdb14775232c138bb9b35864b2. 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/DES380002248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3d72df2b4d6094a012e9edfcb3d2704fd34600379a5a06abd1db474c7faaa. 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/DES380002577.
Flute and String Orchestra Arrangements - Brahms, J. / Porumbescu, C. / Enescu, G. / Doppler, F. / Bartok , B.
Strauss, Lehár, Suppé, Kálmán & Millöcker: Operetta Melodies
Offenbach: Salon Pitzelberger (M. Choufleuri restera chez lui le...)
Puccini: Turandot (Highlights - Sung in German)
Smetana: The Bartered Bride (Sung in German)
Smetana: The Bartered Bride (Highlights - Sung in German)
Smetana: Die verkaufte Braut (Highlights - Sung in German)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563629f139741d8aa68c60b71d3135c4cf4bf9a4c88c813abf37aed498cf0100. 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/DES380005633.
Rossini: Der Barbier von Sevilla (Highlights)
Georges Bizet: Carmen (Sung in German) [Opera][Cervena, Apreck, Leipzig Radio Symphony Orchestra, Kegel]
Meyerbeer: Les Huguenots: Introduction. O beau pays de la Touraine - Act Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f28246ba687d953c1af9e5724b3b6601ee682a585807c835f7dcd312427abc. 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/US89R0695447.
Meyerbeer: Les Huguenots: A ce moi tout s'anime - Act Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bb820140fb60870a5231577c92432d8f4ac8fdc85e03fe4c41de6f48523100. 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/US89R0695448.
Meyerbeer: Les Huguenots: Et maintenant je dois offrir - Act Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e8404f5fb73e65bf6afd0dce76686a904c0430712bab0d490a567bd23ad2f0. 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/US89R0695454.
Meyerbeer: Les Huguenots: Des beaux jours de la jeunesse - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97349328853826643d2c8915a460ecb00d72c87d32573e9747c6cf920a422a08. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US89R0695440.
Meyerbeer: Les Huguenots: Sous le beau ciel de la Touraine - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76884de56aad1dfaffbb7c539f43053f1089f43373f0108ec69159365d4336a. 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/US89R0695441.
Meyerbeer: Les Huguenots: Trop de merite aussi - Act One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81694eb674c491e1cb930831c7e6f9cff936cd9370e1edfcce2eb8c9745bf9c2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US89R0695446.
Mozart, W.A.: The Abduction from the Seraglio
Die Entführung aus dem Serail, K.384 / Act 2: "Welche Wonne, welche Lust"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b426413463a0fa5839a76a6f20b14c23c187b441f8328f2705f4458bd80094. 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/DEF057330308.
Die Entführung aus dem Serail, K.384 / Act 1: Fort ist er
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf46b116daea46c12e670180a8921f22ffec019d9574dcbc13fbc8fddc92636. 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/DEF057330319.
Die Entführung aus dem Serail, K.384 / Act 1: Geh nur, verwünschter Kerl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb44945af2c904fcb016b2b1385d1e70acb8dfeae38c29c53dcb2eb95193d6de. 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/DEF057330320.
Die Entführung aus dem Serail, K.384 / Act 1: "Singt dem großen Bassa Lieder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e26b83721ba86cfed0b14376b5bbe4ea4d69888a8450668566232d6cd7c709b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEF057330322.
Die Entführung aus dem Serail, K.384 / Act 1: "Ach ich liebte, war so glücklich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13abe0be0057c54edc3c5c43e2da82bfbeff9f80e7bb0153fb5f2218a90a42a5. 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/DEF057330305.
Die Entführung aus dem Serail, K.384 / Act 1: "Marsch! Trollt euch fort!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee95abd19651d82a1e30ad189b46821734bd7c695d31fb0ec77fd57c5fb3d12. 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/DEF057330325.
Die Entführung aus dem Serail, K.384 / Act 2: "Durch Zärtlichkeit und Schmeicheln"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804cad61da55d18a2c9ecb424738bb3dabbf872c9c2fd925eb7f4bb454a1b31e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:57:28Z), 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/DEF057330327.
Die Entführung aus dem Serail, K.384 / Act 2: "Ich gehe, doch rate ich dir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3fbaea3332f56f90c8885cc2551f908c6380525311bcb0e5f9db6f678dcf98. 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/DEF057330306.
Die Entführung aus dem Serail, K.384 / Act 3: "Nie werd' ich deine Huld verkennen" - "Bassa Selim lebe lange"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b5693d1e652b0018d4af0e2cbf18742542dffca91f393ec00b6e9e36ffef12. 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/DEF057330312.
Die Entführung aus dem Serail, K.384 / Act 2: "Martern aller Arten"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f796022ba56ebca9104b7e21354b4f1693e441b5fc53366c7a873a46403daf1. 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/DEF057330307.
Die Entführung aus dem Serail, K.384 / Act 1: "Solche hergelaufne Laffen" - "Was bist du nur für ein Mensch!" - "Erst geköpft, dann gehangen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8353f05cd62f91f89d220220e80ae4131bf5df58a2d3fbc62a177179de27a37. 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/DEF057330303.
Die Entführung aus dem Serail, K.384 / Act 2: "Vivat Bacchus! Bacchus lebe!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aef02349a811fc5bb33d8d2084c65d23dbbd6750ef071c206cddd57c49a5705. 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/DEF057330309.
Wagner: Die Meistersinger von Nürnberg (1959)
Strauss: Der Rosenkavalier (Stereo Version)