alt=|thumb|Rachel Willis-Sørensen in 2010 Rachel Willis-Sørensen (born 1984) is an American operatic soprano and vocal contractor. Studies She has a bachelor's degree and a masters, the latter in v
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 0x29143a718da8e328fa03dbc3fd2a06374c505ffbcc93b3856188c4af7ec8a11d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0541a247-a0c8-4d4e-8233-659885362641.json and https://artists.proofprofile.net/proofs/artist/0541a247-a0c8-4d4e-8233-659885362641.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 0xe20dc0c5ceb35b2889d01f3574c1372d08146c2cb756589fe68e0222ec8fae58. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11905508.
Wien, Du Stadt meiner Träume (Wien, Wien, nur du allein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db648d866e2955df446136968410451b444cd0aeacf6be61dbc57c5ab93f3ef. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11905509.
Heut ist der schönste Tag in meinem Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e22bace29484ea22526b72113cb5370f71d753d2c5e857bc60ef9338828140. 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/USSM11905510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d0d6ac38d2f32001d78886e1f1b6a82519201f7823a9de396438e0e0a09bb7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11905511.
Wiener Blut, Wiener Blut (From "Wienerblut")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2d806d9632172fd263f14b703beac9433f675e3035fdc2b802aae85acd5972. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11905512.
Ach, wie so herrlich zu schaun (From "Eine Nacht in Venedig")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4440e618f608108df7c4dec826cc2aa66ee9db1761788f3f3ef57e89438593f5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11905513.
Draussen in Sievering blüht schon der Flieder (From "Die Tänzerin Fanny Elssler")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f6d6864a816aa5150aa85000215ce17618d054286ee747e35c2319baaef509. 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/USSM11905515.
Lippen schweigen (From "Die lustige Witwe")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52d1d23fdfd003938f69f65d71f45d778328bcdf55e43bfae73680347a25e81. 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/USSM11905518.
Schenkt man sich Rosen in Tirol (From "Der Vogelhändler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344217f6dbc7c77eb45a563099d0bc74923fa75f1cd8b76b9db9b3f2ca28ec16. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSM11905520.
Du wärst für mich die Frau gewesen (From "Frühlingstürme")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd423da5b2d2a52cc3e10e05bfa94518b22ab50bf4bb3a84cc9a83af554e6a28e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM11905521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcc4eb7c5db343ec20b70c541bc7f8543363e8449298d4ea37770da1248b657. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USSM11905522.
Es wird im Leben dir mehr genommen als gegeben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a0b06119ac0df7281b4856c481a9bf36c09f58edd190f5bbd700e95bab80e0. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USSM11905523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860957b0b1b3b820cf594e6d9d5e82fa658ffb5449283691d67d39ca724fff27. 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/USSM11905526.
Dieser Anstand, so manierlich (From "Die Fledermaus")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354703ab223039824e1e2cbce191637ed906a8e799df2ec9ff4b2e84961242e4. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USSM11905514.
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
Vier letzte Lieder, TrV 296: No. 1: Frühling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6c7b6017d72d611b36ed6dc97b280dc8e5059eabc03d022159762dde4e927. 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/USQX92203355.
Vier letzte Lieder, TrV 296: No. 2: September
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a276efda15dfa1736ab6fe3c7fe21a0e70fec24234572c4534cd5f270621101. 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/USQX92203356.
Final Scene from Capriccio, Op. 85, TrV 179: Mondscheinmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d0dd5c7cb61f3473088ae9a2c80672d9fbc4d1e3a7aff30d07f020f75f60f9. 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/USQX92203360.
Vier letzte Lieder, TrV 296: No. 3: Beim Schlafengehen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63276bc0d504e76a8b5fe779c5efd4dbe8998363e7420ef802335d5eaaad9e01. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USQX92203357.
Vier letzte Lieder, TrV 296: No. 4: Im Abendrot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b919f76cb174390d3b27ae4ac7c6c07fb88ee93f2b99988f2b10a4e5183e1f5. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USQX92203358.
Don Giovanni, K. 527, Act II, Scene 11: Non mi dir, bell'idol mio
Orchestra del Teatro Carlo Felice di Genova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15831657b7dbc0731ff80ac2f60c9555a523a5b1e45a6f753544376e825e328. 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/USSM12109478.
La bohème, Act I, Scene 1: Si. Mi chiamano Mimi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ca90a70375d927f4c045c4e1c1a013a6adcb1f07384e3888b0201297bd4006. 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/USSM12109484.
Rusalka, Op. 114, Act I: Mesícku na nebi hlubokém (Song to the Moon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a447848cbfe3d9d950dae6c2e4f00b028fb9bc53a1a6a2807760f4e400085d. 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/USSM12109486.
Il trovatore, Act I, Scene 2: Di tale amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae86773bc420c9c197397aea7a3dd9129db3fc567b858f40aa73c8a37395e28. 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/USSM12109490.
La traviata, Act I, Scene 5: Sempre libera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaa5b5e7a9d1f41eb17d0544ba8af8253a97c1ab890a531c0e72472e05eac3a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USSM12109473.
Les vêpres siciliennes, Act IV, Scene 2: Ami, le coeur d'Hélène
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a106d4ec5edc270978aac8b56d5b8f8e49c65074fe5f7ef78cea9645cd7885. 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/USSM12109474.
Don Giovanni, K. 527, Act I, Scene 13: Or sai chi l'onore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37288cace50c14ec950a262eeeeb7078260691de36d437ab0dcc678c879f6b9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM12109476.
La bohème, Act I, Scene 1: O soave fanciulla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e228259bacd9b2230db0823db854131e8b439aae3e8afe6cc9f3b92709fa4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USSM12109485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f14b6f2f60b10670674a61cd7ba0b5177f0c1efb15c470745f085ca066d5a0. 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/USSM12109489.
Strauss, R.: Elektra (Live At Philharmonie, Berlin / 2014)
Elektra, Op. 58: "Allein! Weh, ganz allein." - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af13f15edd1394a4c54a044df93d28d19513e57c938d183a4f9f8052d206a0. 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/DEN961430102.
Elektra, Op. 58: "Ich kann nicht sitzen und ins Dunkel starren" - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78d90fe8f24cf417ae2995125f25ab0187ad3975bd343c0283f854267962558. 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/DEN961430104.
Elektra, Op. 58: "Nun muß es hier von uns geschehn." - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef254e09113fcb4f213eae4981c4e25340a1e213440589cdd726f70c2efdc298. 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/DEN961430115.
Elektra, Op. 58: "Die Götter! bist doch selber eine Göttin." - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203631714a34aa26e6cf58148729803a702f135488f0ef69e09119eb2c9e6f55. 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/DEN961430107.
Elektra, Op. 58: "Ich will nichts hören!" - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6471b85dcee91477357b6404753424dc88c2226fd9104b36e3eaa18e99d1dd. 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/DEN961430108.
Elektra, Op. 58: "Ich habe keine guten Nächte." - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4060e36af019b822b31db4cc9e1866ffe3743d6a853abd737224e4d362c8d. 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/DEN961430109.
Elektra, Op. 58: "Wenn das rechte Blutopfer unterm Beile fällt" - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb0bb2f76e349be50a8fb2c6217943894f55ee2642f68c19b32a054e65f8f2. 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/DEN961430110.
Elektra, Op. 58: "Wo bleibt Elektra?" - Live At Philharmonie, Berlin / 2014
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02949b5a3ad7982a99a5f6a353ab9fffcfc6b1e987d18b6a4ddbea811a6ede3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEN961430101.