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 0x9fefd3d7d110aa975e10d711cdcc06677c9ec6e1e214014bb29108c3f9156ec0. 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/65dc13ff-c5c7-4c8e-92e7-a615fb515740.json and https://artists.proofprofile.net/proofs/artist/65dc13ff-c5c7-4c8e-92e7-a615fb515740.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Piano Concerto in F Major: I. Allegro - Remastered 2023
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 0xdcaacee71ec45f7cff6774dd34399a6933abd44b50507787646ebe53651bc130. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192317701 — a six-check JSON result.
Piano Concerto in F Major: II. Adagio - Andante con moto - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d33f541818f3476438446d46e1213d04feb28115ee0f9673d77fdcad5d8f466. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192317702 — a six-check JSON result.
Piano Concerto in F Major: III. Allegro agitato - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7ba37124629527b360542085e72870f1387395078f62473371fe8f6549b46. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192317703 — a six-check JSON result.
Variations on "I Got Rhythm" - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa453fb53534b4f643f054e1b9951111d757770d8f2e7c02c6e2ffa09caa8edf9. 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/HKI192317705 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aeb193f73596b84bca8780e6c256364e97fdaaf63cc910db4aac079bf4471c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192317706 — a six-check JSON result.
3 Preludes: No. 2, Andante con moto e poco rubato - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7602e691ee245b4ba4b38e0beda5896a780d5a0136de7e8348903fede797e3. 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/HKI192317708 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa918f1d9e9b786d1091f175d22e983cccce32cb31ba103e9441d4da1ef7ccb7e. 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/HKI192317710 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a44534e464643ebaf6f588a6d9d6430b4683d73d5c7c217d303fc48f1a7fb. 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/HKI192317712 — a six-check JSON result.
Three-Quarter Blues "Irish Waltz" - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b821567ab92c3920c2d4cc808cab1be6d2c2c08b040785a200beb2a6433853. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKI192317713 — a six-check JSON result.
Rachmaninoff: Symphony No. 2 in E Minor, Op. 27 & Vocalise, Op. 34 No. 14 (Remastered 2023)
Schuman: Symphony No.10 & New England Triptych & American Festival Overture
Bernstein: Jermiah & On the Town Dances - Copland: Billy the Kid - Gershwin: An American in Paris
Ich mag keine Klassik, aber das gefällt mir! - Für Kinder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa037cd64471d42d02deb12feb8f13fbfb29b4b60936cc7430f4435ca56d78b9. 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/USBC19500506 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5deb392e0833fd28cf69a1155a70ece675fbdffe46b5421a93c81349c60caeb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USTE10302059 — a six-check JSON result.
Rhapsody On a Theme By Paganini, Op. 43: Variation No. 18
Uplifting Classical - Music to energize your mood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8619f5939c85862d5d198ce56cc3440523979a464d25e35df2a0ee552dbc5d18. 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/USZDG0601191 — a six-check JSON result.
The Nutcracker, Op. 71, TH 14: Act II: No. 14, Pas de deux. Variation II, Dance of the Sugar-Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac81f154e39a79e7629d607681c6cf94629a793ffe1de28c2f02d4dc6f66bec. 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/USBC18500167 — a six-check JSON result.
The Nutcracker, Op. 71, TH 14: Act I: The Nutcracker, Op. 71, Act I, No. 2 March
Ich mag keine Klassik, aber das gefällt mir! Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e327790a886f1df568c5fc3dec895bab37f95a4c931416009ba1db4b20e3ca6. 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/USBC18500196 — a six-check JSON result.
Ich mag keine Klassik, aber das gefällt mir!, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c06514d26a560d4c27b54c07c00b147a3ee6da111e08c917bc8be10c8829ad. 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/USBC19606238 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e55624a05813c075ee890e4f04bf548dcedd90c1b141590f95cf1b1dd16c23. 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/USZGD1684605 — a six-check JSON result.