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 0xb2267312ec95c065b37292f4543c3fdb4ee34a7a6e00c7f8936e3ef30b831392. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a31a5cdc-aa26-4c9e-8950-61e93f23e510.json and https://artists.proofprofile.net/proofs/artist/a31a5cdc-aa26-4c9e-8950-61e93f23e510.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Lombardi alla prima crociata: Preludio (Arr. B. Loeb for Violin & Piano)
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 0x73c8311adb95ba04e7d06a44b64f1d525a8ea8930f304a797e6ec16ec1247fe9. 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/HKI191509501.
Orfeo ed Euridice: Danse des champs elysées "Melodie" (Arr. F. Kreisler for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb203e0d0824b0a4b2f6e432d0059172e06a906d9dac6814ef1c9f78a0139e301. 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/HKI191509505.
A cremonai hegedűs, Op. 40: Solo de luthier (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbffacbc6bba1055c7031fbfa371932b7f9031f89766fcd1d9804ec1c46443f. 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/HKI191509506.
Variations on a Theme of Rossini, H. 290 (Arr. B. Loeb for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a9e29fef954d12d57a55d2280153e3cb5c6046f735d6424e8d89074882c1e. 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/HKI191509507.
Serse, HWV 40: Aria. Ombra mai fu "Largo" (arr. A. Wilhelmj for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9d548c1bdb0a68792252cad9671d5cdebb45b0bf45ad48ab82c572a93b2cb. 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/HKI191509508.
Eugene Onegin, Op. 24: Wohin seid ihr entschwunden "Lensky's Aria" (Arr. L. Auer for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88aad07900519e3f542701a35311b93f299a54455819cc5382c1a2c449cebcd. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/HKI191509502.
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
Nouvelle fantaisie sur Faust, Op. 13 (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b9d284d91db8dcda58f6f3a5bdedbfc1a8c193f7e5307336f547e7c5eff1c. 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/HKI191509504.
La forza del destino: Solenne in quest'ora (Arr. B. Loeb for Violin, Viola & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f0beb6711c5483fabfd1a770fe3e599d2748f32c13bb738a44a2d075d892d1. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/HKI191509510.
The Ragtime Dance: Rag-Time Dance, A Stop-Time Two Step
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25379126450a1c8adc72541dac42ee0f4f9cfbc0684c08fe091460a84975aec3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190645801.
A Breeze from Alabama, March and Two Step
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a593f641343ef28e39a93caff0c859441bbbaa6c0dd33cfa49c68493ffb48b0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/HKI190645802.
The Chrysanthemum, An Afro-American Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2778f5875f3feae0c73c1f1832bf97f979d4a04fd2e3d512ec45e247604bb8. 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/HKI190645803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb17c2e479cf2cd50669f987249fedd5282dbf672bc139c00296b779f5ddd85. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190645804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04fe23521a9b7f27a91e00f07bf8f5205d5a2157fca6a65885d7a3651c4e6d3. 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/HKI190645805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced6cb2ad5c06b7e10a4ececdafcf64bec1b53c167a9e56091e7d054b91fb6a. 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/HKI190645806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e476f3408ab867a5598af3b37d7cc06e808d48f55db7b850f2315ea9d76096. 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/HKI190645807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9e89919bc159016b4c296dd994015696353103a1f4c16a4bcab04ace9449a6. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:25:58Z), 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/HKI190645808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdc8980d31283202184ac360ec91f8a39074da45a2e61355038d5174d2d2ddc. 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/HKI190645811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe082587365467d331d2c86e9ada38a48f4f58ee55742fe42e79fcdb0c4603907. 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/HKI190645812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573135299cbf643507300aac13a4fba0dcc279b42a98519473bcb1b96d1a7c21. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HKI190645814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95948832903142f1f9d2b754ffbaaa626a5d018d54ace93b50e77d1b7bfb4b5a. 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/HKI190645815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda2525bb56e21b80bd7d6ffbdc49db5ed0c1dbc34d93c6f6b40f1df426bf94c. 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/HKI190645816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc45b0792f30d87747579128bdd5dbeaec81e564738672fdb73c16ef5d14faa1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:16:50Z), 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/HKI190645813.
Great Collision March: The Crush Collision March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a024bfc4f2772326414c3373b7f5f96308f5f6b13645b82bbb4ae12c6aff99. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/HKI190645809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4e9ba1316350e31e10792d7ae436a95ba1f24e895d9f792c01e4a868499148. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190645810.
Mavra (arr. S. Dushkin): Mavra: Russian Maiden's Song, "Parasha's Aria" (arr. S. Dushkin for violin and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b6d2ce0d3268d8a974ccfa7d1c709b0835998128b643bd7f335868a302b797. 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/HKI190717603.
Ainadamar: Desde mi ventana (From My Window) (arr. for 2 violins and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1dacac0344b9f7ae0d3532e87c5e078b9aecb68b7287d1d6d2425d8c98b9cf. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:21:31Z), 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/HKI190717604.
7 Stucke nach der Dreigroschenoper: No. 1. Moritat vom Mackie Messer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9899a89a19102d31e8b99b612620000488bf7e17dd172e9ec33c7811a3ee52ef. 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/HKI190717605.
Les pecheurs de perles (The Pearl Fishers), Act I: Au fond du temple saint (arr. for violin, viola and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a000f53e0d3fc9c7c4715aff5e33b2be0772824a869a216e48ef9dc114784fb. 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/HKI190717608.
Le roi d'Ys, Act III: Vainement, ma bien-aimiee, "Aubade" (arr. J. Szigeti for violin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cff08fce656409aac85d6aed5e3b09ec48e255a703d62911555988b3e4d258. 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/HKI190717609.
Carmen, fantasie brillante, Op. 3, No. 3: Fantaisie brillante on Bizet's Carmen, Op. 3, No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601e867714906214a45cf9086375fd365e1f5a1dbee74fc17c79a3cad0f8ae6c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:05:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190717601.
3 Duos, Op. 63: 3 Duos on themes from Wagner's operas, Op. 63: No. 3. Lohengrin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec17b76698dc63794a547b0c726c64adc26b9af5d120ce4c8b49c269ce21473. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKI190717602.
Toy Symphony: And Other Fun Classical Favourites
Music for the Royal Fireworks, HWV 351: IV. La Rejouissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd33db83325dc8924171c4a5cadf190efbc7346475e043d8dd08f625cba8fee. 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/HKI190516621.
Cassation in G Major "Toy Symphony": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73e670306d0608521e4a6033b22df5779ccb6a7c7ad84e2e412eface10be6c. 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/HKI190813405.
The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea464b20c2b74eff1b3b0b7327d81bfb8d29619657841b8cfbe16ed9e5c005f. 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/HKI190622804.
AVS Presents: 2024 - Flashing Forward Thinking Back