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 0x8711827d7475384f261f190337eb445d2a7f940fe2994970eee68f2ff779f5d7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e98a97ea-58b3-48d2-8719-2015a371d100.json and https://artists.proofprofile.net/proofs/artist/e98a97ea-58b3-48d2-8719-2015a371d100.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Here The Deities Approve (Henry Purcell)
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 0x55c7b6e556f5a027852a154426ba09ddc5c38b4606fc72a5bdc1545552401cca. 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/USA560638641.
Codiad Yr Hedydd (The Rising of the Lark)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad99be77ebc425d5037209fd3caf3469ce4a81b7ae019c47f4cb266812e2a0e. 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/CALC40900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c427e8e23bc2f72bda8317c1dbc3477c64b9de1c48882e411ff6c5017be85fa. 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/CALC40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e1f8b8c13e8375d9ee0fcf29c2954ef5fd0a7f4171815e53a670911b8f81c. 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/CALC40900014.
Graupner : Intégrale des sonates pour violon et clavecin
Chaconne in F Minor, P. 43 (Arr. for Cellos and Continuo by Amanda Keesmaat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8501cc980e78fbb586237f5bccc9bb445bd1e4e57bfcb944f4a4267e54143952. 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/CALC42200254.
Sonata for Violin, Obbligato Harpsichord and Bowed Bass in G Major, GWV 708: III. Allegro
Sonate pour flûte à bec, basson et basse continue en la mineur, RV 86: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f51e692dba7f6166b3705d1d9bb6ce10b37b459bd074ad0525a97d92373635. 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/CAJ721775302.
Sonate pour flûte à bec et basse continue en sol majeur, Op. 13 No. 4, RV 59: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed393dba041ec99cfd0d388adc4381b14f543f851c6327d7f833695b5e3797. 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/CAJ721775308.
Trio in E-Flat Major for Viola d’amore, Bass Chalumeau & Continuo: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46716a3919adc3a2264a5d20b42b7971c4d86babcc5dca4edb90d77dbab4137. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41000085.
Classical Expressions: Best of the Baroque Period
Second livre de pièces pour clavecin, Ordre Sixième: No. 5 Les barricades mystérieuses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df450cedb0579f6be6c0e64911a37f1adb7ff07783398524c1c9481692d91ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA370568321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22ac25c6c08ad14b55d04504712a5aa64a4a6094fd8b2c41bc995c330216a3. 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/CALC41601221.
Sonata No. 5 in F Minor, BWV 1018: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbf9e58361a83d025f04ca075c96d1ecea579acd082b17d31a1cb222e8c3b85. 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/USA560611278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bcf8a4e28c5759b65b3db8a63cc189666657aa855faeffb67111beb0be06a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA370539282.
Mi palpita il cor, HWV 132c: IV. Se un di m'adora la mia crudele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535fdef91fd1e1f6a2c7426fa2acb1921c3a42e764877959965403198c3f150. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA370524133.
Classical Oboe, Clarinet, And Flute Performances: The Definitive Collection
Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004306d876bb9c3bffc75720345d90076e676c26304f0a76cf1c994a715f8b67. 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/USSM19915867.
Flute Sonata in D Major, HWV 378: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ade136b55782729818f6143f53b64fe232cff8a7da2a4ed90de1640c3cf178d. 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/USA370524144.
Flute Sonata in D Major, HWV 378: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83b07c7d5cab4d00dec9820d90fc2a1fcbab1beea5f5abe8e079b8ea27e049. 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/USA370524145.
Oboe Concerto in D Minor, S.Z799: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfaeb9e938e713491dd7feed008435d6b9bc2694ff5a2dd752dceb7275e6fad. 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/USSM18000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8a775768997e1ddddaa44f7f7df44c3c5783df0b93d9b3c061c5989e11a36a. 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/USSM10207052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3138170682543dccbf8d624c57da7d067f45a97a1ff72a157d80f8837ed945. 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/USSM17800478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06737e34ca3d0ca22a57349327076a6bb9ad02161f1e4c0975ce19194f2a0fba. 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/USSM17800521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d27f9e4f8a0ccc91e24f3723f92a2009e44fddfadce956911c6ff975d155f8. 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/USSM17800522.
Sonata in C Major, RV 779: III. Largo cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bf96fc1fc28c7b311c72441eec63a58776deaff44172ae7c56816ccd8222e5. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USA560545734.
Orfeo ed Euridice, Wq. 30: Dance of the Blessed Spirits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78000a37ff6ed7bdf20e0e30e028b1f7ae2307bddc827d499d2f6ce6dcf36ac. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USSM19600490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f754c4d0d1258db9ad60212188657100861620d00c2708ef3296e2272d0124a. 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/USBC19100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ee9acb40c8ddf0871c86590a7661b8b6609c139f91b0ceafe5a7eaabb1605. 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/CA4Q31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96776bc67db8f9eb9cc1767429308205d405095d207c700228278e7aa959923b. 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/CA4Q31900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06489476724d6e916bf3c5bd9d044c5dac9d16401c9805b4fd7a0912a2ec4362. 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/CA4Q31900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9312d6024e1c53bdcd19159d29d5a4bc57300c9303efbe8cbe845018d31c4. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CA4Q31900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25b4bf31a12504c9ccd0aab694f913af980916511f6b5ce5b38ced6ed20139. 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/CA4Q31900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe019963ff2010c6c25b2377868ef8ca10c18bcdec6ffc128291bda0f745c57aa. 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/CA4Q31900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef22b70c911c1db7d41b61f1ae7626d8fedcce8cae53cd41e111f179eba37b3. 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/CA4Q31900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42d38567dc06b67e4117bc32fd9383f679b1f9aee02bb27be8b993ea5ba33bb. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:43:39Z), 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/CALC41200541.
Handel: Italian Cantatas and Other Works
Fra pensieri quel pensiero: Aria: Fra pensieri quel pensiero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e6e2795ace0b7b33724cfef0370beb3dc39e62be4b6ffee7ef0df99b9c6b2. 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/USA370524155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbf2682220b65ec42c96017cd18b08e0a9b28eb41e38ac6e6138582e828544f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CALC41001204.
Stabat Mater in F minor, RV 621: IV. Quis est homo: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9c474a72a074cd081c5e75af1130e0623c327e23a95f20bb22b6dd78e9748. 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/USA370520970.
Dydd Gŵyl Dewi - Welsh Traditional Music for St. David's Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c427e8e23bc2f72bda8317c1dbc3477c64b9de1c48882e411ff6c5017be85fa. 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/CALC40900003.
Un basson sous l'Empire: La musique d'Étienne Ozi
Ozi: First Sonata In G Major: I. Allegro moderato