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 0xbf72eefa9214f0448d379a5947be6ce0cc825a36eb4a592d8de50b82bff70c95. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/717fc1a0-bc26-414c-9aac-0e3ade4081ee.json and https://artists.proofprofile.net/proofs/artist/717fc1a0-bc26-414c-9aac-0e3ade4081ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schubert: Auf Dem Strom / Schumann: Adagio and Allegro / Strauss Ii: Dolci Pianti
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 0xe3a6123478e3e2db8e300758c4e6619adc5efb8ac031d6e93e0d98231867f307. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HUA253158501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5e491b3ae72f18a41dcd7fe788841fc86c80b756f1a7bf114a17f4d4e28c8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HUA253158502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24591107013d151d09106029efae17a4d91069aa987206107508c923e4c0d98a. 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/HUA253158505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090fe04e3742d7128bf89927dc6b5171877cd7cb94a0037d504297a0f662553. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/HUA253158508.
The History of Classical Era Music (100 Famous Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed02400c527a83eb4c35cf593c59a31c3bf245f7cf166d7cde60d8986a769b94. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/US5541402498.
Relaxation: Classic Care - Music for Healthy Living for Unwinding & Taking It Easy
Flute Trio No. 15 in G Major, Hob.XV:15: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0ed558655e2928f5fa414d9fc48e9555a5589f6339b2386bb098082292ac71. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US2TL0926804.
String Quartet in F Major, Op. 3, No. 5, Hob.III:17, "Serenade": II. Serenade: Andante cantabile (attrib. to Hoffstetter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c738f8320fe4d6fc73445a76a13ddb371332fc98868152125ff31939125f3f. 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/US2TL0926806.
String Quartet No. 62 in C Major, Op. 76, No. 3, Hob.III:77, "Emperor": II. Poco adagio, cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b495c5e0897f5e7828f934713233814a89563813425d79f54daca6be577b7f5. 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/US2TL0926810.
Forster / Haydn / Cherubini / Mozart / Mendelssohn: Works for Horn
Viennese Classicism In Slow Movements, Vol. 2: Mozart
Klavierkonzert Nr. 21 C-Dur, K. 467, "Elvira Madigan": 2. Andante (Elvira Madigan): Piano Concerto No. 21 in C Major, K. 467, "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9213e4f40f5fd06976789e3948e97db3de55005a12e4e7fe9b4b0357e97051. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/HUA250104801.
Violin Concerto No. 4 in D Major, K. 218: II. Andante cantabile (cadenza by Joseph Joachim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337ba99d4b7cd16810667fbaec0f1d406d0cdfd8d621134b3f6a89553bb17b58. 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/HUA250104802.
Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): Clarinet Concerto in A Major, K. 622: II. Adagio (cadenza by Bela Kovacs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0efae3f29dd524241ebb9d5dfd61cc1c4b83aadf47e3f63d6242cd03d3ac31. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA250104803.
Divertimento No. 7 in D Major, K. 205: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ebe341f4f113fa47013248ff8efb7bd4eccc420cc4b5fb073a76a85e11d92b. 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/HUA250104810.
Piano Concerto No. 23 in A Major, K. 488: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37aac8f9405f79b96f4726128be2345a70716bb7a629e93474407334790e78f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0926902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea9905de673a3f895b7e917e7d6f2f544d04418a412db65756361193d337691. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/HUA253245905.
Haydn: Concertos for Flute, Oboe & Orchestra
Mozart: Divertimentos Nos. 7 and 17 / March No. 8
Chill Out: Classic Care - Music for Healthy Living for Resting & Recharging
Mozart: Two Divertimentos in D Major K. 334 & 205
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f2756d76881d413f0167ae590014f71c31d05bd4661373f8393178a824da78. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA253147215.
Stress Relief: Classic Care - Music for Healthy Living for Banishing Worry & Anxiety
Haydn, J.: Symphonies / Concertos / String Quartets / The Creation (Masterpieces)
The History of German Music (100 Famous Songs)
The History of Concerto (100 Famous Songs)
Haydn: Harpsichord Concerto in D Major / Concerto for Violin and Harpsichord / Symphony No. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6017675edf210d591fba00d1999e1e380bc31ec9de997dc72ce3a9086ab96b9b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA254033007.