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 0xce2353de32e0d15500cd6f545bfd9270273d1f7f68f52806d69d8e69e041d721. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06e7c331-8f97-47d4-b782-bb8dde57bc67.json and https://artists.proofprofile.net/proofs/artist/06e7c331-8f97-47d4-b782-bb8dde57bc67.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Twilight Of The Gods - The Ultimate Wagner Ring Collection
Das Rheingold, WWV 86A / Erste Szene: Vorspiel - Weia! Waga! Woge, du Welle!
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 0x4456007d822c0676551a4e6b5c6504a33e28d3e5e623965c83fec91ab218e199. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003730 — a six-check JSON result.
Das Rheingold, WWV 86A / Erste Szene: Fing' eine diese Faust!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f1b51519f55161d5f1d15856ae1bb10e7833aa6c59ce1203ffa0d2d27087e8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003740 — a six-check JSON result.
Das Rheingold, WWV 86A / Zweite Szene: Wotan! Gemahl! Erwache! - Vollendet ist das große Werk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa781310157871fa523821f2e2207853d0bb5eb5a24b487201dc396ddbc76c82a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003750 — a six-check JSON result.
Das Rheingold, WWV 86A / Dritte Szene: Ihr andern harrt bis Abend hier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781494f2f02e375f7bb0e9da7a291b9ea2fdd41a73a7beb94214c721e2f688c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003760 — a six-check JSON result.
Das Rheingold, WWV 86A / Vierte Szene: Bin ich nun frei? Wirklich frei?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25da771e7fae77f69ccaf990d848a8306d68f17ef273065f2e1ead224715a4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003770 — a six-check JSON result.
Das Rheingold, WWV 86A / Vierte Szene: Weiche, Wotan, weiche!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c11b617ccc9e0422517146269c4d6ebd8949b6e5f01d0c72e629ec0935ad5b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003780 — a six-check JSON result.
Das Rheingold, WWV 86A / Vierte Szene: He da! He da! He do! - Rheingold! Rheingold!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef695579a7d873dc267cb853cde9c6d31836f33f07b90273c66db25bc45dd77d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961003790 — a six-check JSON result.
Die Walküre, WWV 86B / Erster Akt: Winterstürme wichen dem Wonnemond
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7246e6f72c9182d86cd932ebbef8f2237fa15c264d34e0830fe15c7d083a0f4e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961102110 — a six-check JSON result.
Die Walküre, WWV 86B / Dritter Akt: Vorspiel...Hojotoho! Hojotoho! - Ride of the Valkyries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e7023b7cc7541f145d1fe8944f504b1bb27a5c6e2dbd73c51e887ec4829fda. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961102140 — a six-check JSON result.
Die Walküre, WWV 86B / Dritter Akt: In festen Schlaf verschließ' ich dich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5b652477857fbca6a54223fa924d5996178891571484e52b4bd28f4e440a3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961102150 — a six-check JSON result.
Die Walküre, WWV 86B / Dritter Akt: Feuerzauber - Wer meines Speeres Spitze, fürchtet, durchschreite das Feuer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd2e0f91aa413c28317eeec468bfb5e1770f0ad6498bc0e72da273732baaef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961102160 — a six-check JSON result.
Beethoven: Fidelio (Live Recording 1960)
Richard Strauss: Der Rosenkavalier (Live)
Debussy: Pelléas et Mélisande, L. 88 (Live)
Mozart: Le nozze di Figaro, K. 492 (Live)
Mussorgsky: Boris Godunov (Sung in English) [Live Recording 1956]
Richard Strauss: Der Rosenkavalier, Op. 59, TrV 227 (Live Recordings 1946)
Verdi: Un ballo in maschera (Live Recording 1947)
Wagner: Götterdämmerung (Live Recordings 1957)
Beethoven: Fidelio (Live Recording 1951)
Mozart: Le nozze di Figaro (Live Recordings 1949)
La Fanciulla del West, Act III: "Risparmiate lo scherno ... Ch'ella mi creda"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c6e023f736815c715706f803b5aa06b033fbaa8752caacae4e8f15c799b9c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P1400019 — a six-check JSON result.
J'aime pas le classique mais ca j'aime bien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c9b483f7d41bcacd3d99e2b222af79d5d6b4084879a38f2ae10b01a4dbe3e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19607821 — a six-check JSON result.
Ich mag keine Klassik, aber das gefällt mir!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46c9b483f7d41bcacd3d99e2b222af79d5d6b4084879a38f2ae10b01a4dbe3e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBC19607821 — a six-check JSON result.
Don Pasquale / Act III: "Senz'andar lungi...La morale in tutto questo" - Live At Metropolitan Opera House, New York / 2011
Anna Netrebko - Live at the Metropolitan Opera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89536850fd1661c61f80c9d897c854a2bf8535cfa7f73f0560488afac1d74b1. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71102724 — a six-check JSON result.
Lucia di Lammermoor / Act III: "Il dolce suono" - "Ardon gl'incensi" - Live At Metropolitan Opera House, New York / 2011
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d90057cb9c7bd1e679bacd9bbde826ff1493b0da80098ce46fd4d0b74b60c48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUM71102729 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b929b6173562f2fdd168517f8f416ff0b99ffe60b44568081a9362edffc7160. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USY3P1400016 — a six-check JSON result.