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 0x20e9db1b29ba955ef232fd5b182eec441cbff6c8e694f0666d13999455a36a71. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a0da995-e68a-42a3-93e4-4c391586d9a0.json and https://artists.proofprofile.net/proofs/artist/5a0da995-e68a-42a3-93e4-4c391586d9a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms, Glazunov, Sibelius: Horn Quintets
Mozart: Sinfonia concertante, Music for French Horn
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 0xab52ca34375da61628e4dc31ccbd856a0a783d4d4926fa24eab98e30e2b5adc2. 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/CZA161800900.
Adagio in F Major, K. 580a - Arr. in B-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231425495100d59fb4dd60cad7774569ebc93fd6c552909fd8fc28e6fadad450. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833a9a92f7815611f4250974c1cfb027e14bb89eefbf99b684cc1e583decf13. 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/CZA161800902.
12 Duos for 2 French Horns, K. 487: No. 1, Allegro - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70114c002c6f2915fc532ae926495aed7888238c6f76ca121216f0f27e02bb6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CZA161800904.
12 Duos for 2 French Horns, K. 487: No. 2, Menuetto. Allegretto - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6925a04df4a3e96948176e2bf97f1f6700d39266f90fa8cd5e2d4e70fc97a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800905.
12 Duos for 2 French Horns, K. 487: No. 3, Andante - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d57e806af05a36c5375f5267497f5c0a94564842a87e84da2bf1822e927fc35. 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/CZA161800906.
12 Duos for 2 French Horns, K. 487: No. 4, Polonaise - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0267865b76146f73cb1c48de2ae20778ed9aa54d1cbe11355d4407c3ba8fc3a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CZA161800907.
12 Duos for 2 French Horns, K. 487: No. 5, Larghetto - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ddc681dd184b3c6cb628e8a9b9b97068bc0a6169000c1b727a9b9ceccb4172. 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/CZA161800908.
12 Duos for 2 French Horns, K. 487: No. 6, Menuetto - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7218c94c0557bdb5614b53a57196746627188d87b928f6943067f31454a21a8. 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/CZA161800909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeea6bd97e380a889cce046a6b890131bb1116dcec4f0787a3dafb4cd21e8995. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CZA161800910.
Symphony No. 19 in E-Flat Major, K. 132: II. Andantino grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf898f17e64bd4ad7fd5fac3b59c22e266f8a6c5b79da0bf738dcef343c488664. 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/CZA161800911.
Symphony No. 22 in C Major, K. 162: III. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec93b35ca8f03942c7965ac7c45932c8a6457ede8bb939ce6a3eb7e61eaa5865. 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/CZA161800912.
12 Duos for 2 French Horns, K. 487: No. 1, Adagio - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd01e4b8590c1d3411cae8384b48d76c845fcc79311e98c3e510031ca2bab682. 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/CZA161800914.
12 Duos for 2 French Horns, K. 487: No. 2, Allegro - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfe1b83e6c9e814bb2f56deb506bfc575c6624d1a21ad442ce069f41d0196bd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800915.
12 Duos for 2 French Horns, K. 487: No. 4, Andante - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68ad1132c83f954c673946e04751bc900728dd797ff08a66858c1d2d2b6bdde. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800917.
12 Duos for 2 French Horns, K. 487: No. 5, Menuetto - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6023a4e7129ed4a371d4c6e3f892bb177c66099600c51bd2371b038b3aa256f8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CZA161800918.
12 Duos for 2 French Horns, K. 487: No. 6, Allegro - Arr. for Horn and Chamber Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa25e653e6d209add89c963b0de437f0ee370eb0baea1280fc2de1ccb066210. 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/CZA161800919.
Sinfonia concertante in E-Flat Major, K. 297b: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee2dbf2f22a5b585d28be7942ce55c508912363c2617bee916294313b00acbc. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CZA161800921.
Sinfonia concertante in E-Flat Major, K. 297b: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf22252d9cb2acf4505077264fc110822530f500918f0285e08ef9c0b295156c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800922.
Sinfonia concertante in E-Flat Major, K. 297b: III. Andantino con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2edf08363da476a2f23a49b2aa6a5de7e2440e9eeb2bc8687f315294f7ce38. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA161800923.
Horn Quintet in E-Flat Major, K. 407: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403695804320adea582d2a3046d737947e3b4ffc3a68bf7837c9ce25172005b6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CZA161602237.
Horn Quintet in E-Flat Major, K. 407: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07af01d5ffdc0042a62dae3fed305b8dc346bc1acb1c59ef5cc78381b5854fb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CZA161602238.
Horn Quintet in E-Flat Major, K. 407: III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1715396ef31a15debad62d9e32e0ce021b621662ae972f4d650f401ec40ca9a9. 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/CZA161602239.
Horn Concerto in D Major, K. 412: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeabc52f7fc4f4974643d94e1f0fb76ad74a80db8bdd0612d1d0142e61ed471. 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/CZA161602241.
Horn Concerto in D Major, K. 412: II. Rondo. Allegro - Finished by Franz Xaver Süssmay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0674b10879fa1b3983ad44214a7e4badd3bbc4c5b64570274cf35314a06165. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CZA161602242.
Horn Concerto in E-Flat Major, K. 417: I. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f43423709e85a4f34ca38ab0ad6b9fe705055689d73dce7f19a82c5a144a3a. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CZA161602244.
Horn Concerto in E-Flat Major, K. 417: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b806d793db5dcbb3562696a58e08dd537198b0fe587df3848e101cc7f86333. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CZA161602245.
Horn Concerto in E-Flat Major, K. 417: III. Rondo. Piu allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bd6970b87dfac6656c10925f00601926967d98780c624a6f61ca61a5f55a46. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CZA161602246.
Horn Concerto in E-Flat Major, K. 447: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c353c39eaf1cacde62c5a90f1e7de013ee8134fad7d72d51bfd31c9484663. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CZA161602248.
Horn Concerto in E-Flat Major, K. 447: II. Romanze. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a63b8632cb1ad619cc01d815d83701ba1a67fae62bb93a61dab1c0c6dece3e. 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/CZA161602249.
Horn Concerto in E-Flat Major, K. 447: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7b7a252ec9ba7bbddccfc4808228b64a0e43c0e498c66781ad3bb8485b3233. 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/CZA161602250.
Horn Concerto in E-Flat Major, K. 495: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801aaf0166a229b39640e3569c791f3cf0c0eb5a6a60e269aa7420d690eeb39c. 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/CZA161602252.
Horn Concerto in E-Flat Major, K. 495: II. Romance. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f081680715fdef6d1f4297b62d1458684f19dd7408bfa7be74fd009eec1c44. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CZA161602253.
Horn Concerto in E-Flat Major, K. 495: III. Rondo. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2829c2920d017768803df2de2433d7eec75970f25e0efe4e19a7b392ee79b611. 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/CZA161602254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93c0e73127c7550c84b1537513d24edf02823a5dd2a6f281321c04556060e4a. 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/CZB871404001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564d380abb6c5f6a64f93173887f22bdbf78fbc75cb8c623b7dd3cd79be530f3. 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/CZB871404002.
Histoire du tango: No. 3, Nightclub 1960
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6218205c507144e582941cbccc0be127b6ee39812c4ab7a0fbca8d86667f1eb. 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/CZB871404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6818e209f89a81771b6a2ea44e78a3a25ff4737aed1ba986d185195f14ecbcf. 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/CZB871404011.
Suite for French Horn and String Quartet: I. Tango
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5b0a09ea94fd850c27a05506d6e873a105d91b6ae8cae59365a9a2c675c3c3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CZB871404013.
Suite for French Horn and String Quartet: III. Speedy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d669cc170d43eb6c8ebc2a7a32f59e86391103a45046e63735c5313d8098a. 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/CZB871404015.