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 0x3f8c894f106cc1e5b6d9a9f03d3c5950f14d04d0b9851b41426dadcef4d63504. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4811f973-a913-4cc7-a2a1-c888968cb005.json and https://artists.proofprofile.net/proofs/artist/4811f973-a913-4cc7-a2a1-c888968cb005.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Goldene Operette / Der Bettelstudent - Großer Querschnitt
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 0x2f621a9a2a52f77c90930563cc6a9671d8feb1f70127ca0db240a860828a4fe7. 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/DES380002229.
The Gypsy Princess, Act 1: Alle sind wir Sünder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d7dbc5fa6cbcc6fcc2eddec5f848c2b312331b81a1f4222ae36ab6e07ef528. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DES380002558.
The Gypsy Princess, Act 2: Tanzwalzer. Erstrahlen die Lichter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc272bcc116aed04ca977b65afe9fbfa545a85854c6f2eb825899a51ddb449048. 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/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.
The Gypsy Princess, Act 3: Terzett. Nimm, Zigeuner, deine Geige
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb8efea8e3ed5aa12221ee58562bfdfc791f914ba2c3e05998306f3ce6551a. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DES380002563.
The Gypsy Princess, Act 3: Finale. Tausend kleine Engel singen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef2a2ee1e4285df7d4dd5044993ed8eadde86bf62a0681e17b43ad14815ca5. 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/DES380002249.
The Land of Smiles, Act 1: Ach, trinken Sie vielleicht mit mir ein Taesschen Tee? - Bei einem Tee en Deux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b8c4e98e1aeaf513c28d44222f4d93bc845caafad62cbff58af078c175b73. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DES380002565.
Mask in Blue: "Schau einer schönen Frau nie zu tief in die Augen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf43416d8f8c7c420859102be1187d32223fef64fc61406931ee8dee04b8adc2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DES380002567.
Der Bettelstudent, Act 1: Einkäufe machen sollten wir eigentlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d71bc3d120866eb776cc6192b51263d86abb82add20bc5d91e9de61c945d1. 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/DES380012723.
Der Bettelstudent, Act 1: Ich knüpfe manche zarte Bande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2953cf886eabefeb27b50e7962e1327611f622ff49f8298c7f860021972531. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380002239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3d72df2b4d6094a012e9edfcb3d2704fd34600379a5a06abd1db474c7faaa. 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/DES380002577.
The Land of Smiles, Act 2: Wer hat die Liebe uns ins Herz gesenkt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06227c604593f96a7cde0745522fbab518f68156ad829934f60e767e51714bf5. 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/DES380002585.
Victoria and Her Hussar: Einmal da schlägt für uns die Stunde - Reich mir zum Abschied noch einmal die Hände
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaacdbcc1b1a51383606c5184d812a1ff2a8d24072b614aaffdb4c2ce52d2e854. 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/DES380002594.
Millöcker: Der Bettelstudent (Highlights)
Flute and String Orchestra Arrangements - Brahms, J. / Porumbescu, C. / Enescu, G. / Doppler, F. / Bartok , B.
Franz Konwitschny with Gewandhausorchester Leipzig, Vol. 10
Symphony No. 5, Op. 67: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12545d45a76de2bb55c8ab23325f704b30f526f5d3906702ad5db99c2ff1ed80. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DES380023119.
Die 50 schönsten Klassikmomente - Wassermusik - Der Sturm - Ode an die Freude - Carmen - Clair de lune - Halleluja
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9672c229d494d2cf3733999373e622aae5615420a748608be99b4761e5262. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DES380007944.
Wunderlich, Fritz: Legend (The) - Arias, Opera and Operetta Scenes and Songs
Beethoven: Symphonies Nos. 1-9 & Other Works
Dessau: Condemnation of Lucullus (The Opera)
Strauss, Lehár, Suppé, Kálmán & Millöcker: Operetta Melodies
Beethoven: Symphony No. 9 (Schätze der Klassik)
Beethoven: Symphonies No. 9 & 1 (Mono Version)
Beethoven: Complete Symphonies (No. 1-9 & Overtures)
Nicolai: Die lustigen Weiber von Windsor
Beethoven, L. Van: Fidelio [Opera] (1956)