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 0x32f909fae42f498f9721c802dd6e800b038019723445ff7896723313323dadef. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc3a850e-79d2-4dfe-b352-ee184487c581.json and https://artists.proofprofile.net/proofs/artist/fc3a850e-79d2-4dfe-b352-ee184487c581.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Requiem, Op. 63: Ia. Introit. Requiem aeternam –
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 0x0810a3f1da72531774b6f12f7951978790d89251f03d11435d76397b37596574. 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/GBAJY2341801 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99f8e42490ea880ecf5668981fd780ea47f723ab51f289313c63037789a18f1. 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/GBAJY2341802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496abe641796b0b7fe460e9bd25db58609b07083871c05675c672d95187da18d. 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/GBAJY2341803 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5cba5573de44151e83f4bdc645b95151dad27b8cd54f4b9949ca416acfb70b. 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/GBAJY2341804 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4487e4f3d4fed50c294a882628bc297a3820f777cbb67962e1b83c9205584533. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBAJY2341805 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768e63e95e1963af39bc6fa4665dff4c34a5548c9a7d0fe63eb1b5257ff6115. 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/GBAJY2341806 — a six-check JSON result.
Requiem, Op. 63: IVa. Sequence. Dies irae –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93ce631dc8e6c37764b8d544a754423b88a3c2a1f2f4476ee44493ab9ff667. 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/GBAJY2341809 — a six-check JSON result.
Requiem, Op. 63: IVc. Liber scriptus proferetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ef683b0a05dd086835623ced1bc809ccf603ae8494866115ec2824656897a4. 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/GBAJY2341811 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ed550305a958f04c5a03e79fc5b7ba9ded4d6630005b0c007dead961582917. 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/GBAJY2341828 — a six-check JSON result.
Bagatelle No. 25 in A Minor, WoO 59 "Für Elise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790611b6dae8c7044dd32701e0ad3c665f688f52441fe9f5531577a602fa42eb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1612523 — a six-check JSON result.
I and Silence: Women's Voices in American Song
Beethoven: Der glorreiche Augenblick - Choral Fantasy
Der glorreiche Augenblick, Op. 136: Europa steht! (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c4ccee8a07b8cfb1c7d28b9bceb9f5ea527962850cea9d21342e61aa931473. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191114301 — a six-check JSON result.
Der glorreiche Augenblick, Op. 136: Recitative: O seht sie nah' und naher treten! (Fuhrer des Volkes, Genius, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7850e6b2de444ac16fc60903af8a53bf9c945e16fb69d2f804fa8cc1617e4a69. 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/HKI191114302 — a six-check JSON result.
Beethoven: The Complete Symphonies, Concertos & Overtures
Symphony No. 8 in F Major, Op. 93: IV. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d068329cbe061847962c3f3b23c93108421956b828d40cd277af477fe48e31. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199606208 — a six-check JSON result.
Holst: The Coming of Christ & Other Works
Hurd: Choral Music Vol. 2 & Complete Solo Songs
A Guided Tour of the Romantic Era, Vol. 1
Emslie: Omega and Alpha (The End and the Beginning)
The Faerie Bride, Pt. 1: No. 1, Prologue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf479ff4778c35b0448d36cbe5171458ad2024dace9388656af8dc8c03098ddfe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAET2500021 — a six-check JSON result.
Gavin Higgins: The Faerie Bride, I. Part 1 Prologue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eb804cd75b57e688ac506745c7c4272b4c0d48c5bbff1a584e042c970b2931. 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/DEN962530101 — a six-check JSON result.
The Passenger, Act I Scene 1: Das Ufer in der Ferne ist nicht mehr zu sehn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aac08db204c8861a4b395107bd3177a518fbe64902a9eb783fff1e8e1500c57. 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/DEN962530102 — a six-check JSON result.
The Passenger, Act I Scene 1: Drei Jahre sind im Nu vorbei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6886e3f4c9949256e980ffc14a993c4e340f3413e218bef8b76f808489e03c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530103 — a six-check JSON result.
The Passenger, Act I Scene 1: Was ist los mit Ihnen, Aufseherin Franz?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fba8c706e17593c8ca4be73c019535b7ad8fb95709f4ea3a97477c1636cec9. 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/DEN962530104 — a six-check JSON result.
The Passenger, Act I Scene 1: Marta? Kann das Marta sein?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710fa859ca044f7b38bf2c781b6f0ad90509d9ae1ff4d06708a455eaa687bb79. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530105 — a six-check JSON result.
The Passenger, Act I Scene 1: Negro paredón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42518f8752ce88f29ea7488dbc66d79d975354603f37d9108c1721085615945. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN962530106 — a six-check JSON result.
The Passenger, Act I Scene 1: Das ist alles Unsinn!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb549cdd3cd6c5f47d6afac2c0ef558aad388778c3419064521c105e737c4f1c8. 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/DEN962530107 — a six-check JSON result.
The Passenger, Act I Scene 1: Sei still, sei still
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547628453163006114341ec1bbf0dac74b83ecf13fb7b89b06d45fd4bbfecb04. 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/DEN962530108 — a six-check JSON result.
The Passenger, Act I Scene 1: Angst hat mir nachts die Kehle zugeschnürt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5126e0be09d47f738d67be1e09f9899ce21de7f831fb6f706d680b6cb1343619. 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/DEN962530109 — a six-check JSON result.
The Passenger, Act I Scene 1: Für ein schweres Vergehen, da kam sie in den "Todesblock"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca0fd75e622589cd476b98e71419009cae7bada450bec9cf5ec3f76880d633. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530110 — a six-check JSON result.
The Passenger, Act I Scene 1: Fort, Gespenster der Vergangenheit!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed58ba307cbd67caa34a9857a919399d576122ccccbdebb404408eeed777b13. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530111 — a six-check JSON result.
The Passenger, Act I Scene 2: Wie langweilig ist’s hier, Hans!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130493398a4d2800a545a1e4b851564cae042cd7c79dba3db011b96e2cd5416c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530113 — a six-check JSON result.
The Passenger, Act I Scene 2: Ty ukryt ot nyeba reshyotkoy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe99812206dd015f91440ceae199accdb5dd047e9557a4e5e8f8a7e8fe43812. 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/DEN962530114 — a six-check JSON result.
The Passenger, Act I Scene 3: Další den minul, uplynul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbde46d527599d6171bd23307b9182964cf9d8ed40a40d42717c83487ecdfd46. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEN962530120 — a six-check JSON result.
The Passenger, Act II Scene 6: Jeśliby zawezwał mnie do siebie Bóg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cae4a2dba07d9164a181cbdd39baef398c306c3c4ce97ec0029ce261fea78ba. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEN962530133 — a six-check JSON result.
The Passenger, Act II Scene 7: Your Good Health, Sir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15aea9ec983f262f726764edd2dfb450ed7de464a8ab8252f1306ff9755b22d7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962530142 — a six-check JSON result.