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 0x11ea41d4fe3ae4851afd1977d687e6b38e9cca60e231a7e69c209191fdf17905. 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/36f37e21-0c9c-4a97-b410-5a150c81d48e.json and https://artists.proofprofile.net/proofs/artist/36f37e21-0c9c-4a97-b410-5a150c81d48e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Martin Owen Plays Strauss, Schumann & Weber
Sinfonia concertante in E-Flat Major, K.297b: I. Allegro
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 0x39d47ad21f0f72240225c5fd10bc8731b542b0fe1ba8dd18168a8dc312d1c424. 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/FR50X2293705.
Cuban Dances for Solo Horn, Strings and Percussion: No. 1, Tamarindo Scherz-son
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cf6d69a965055f3b6b74c97aec4b67e24a06881aaf505f1110e4bc22ff3291. 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/FR50X2287804.
Horn Concerto No. 1 in D Major, K. 412/386b: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58815ab6a145be0fc6d5325a5e32e2a40a732dfa171bedbf64eda80151e6a2a. 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/FR50X2287810.
El Bodeguero (Arr. for Horn and Orchestra by Jorge Aragón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3588389fb8e8f1d9be31c23c4eeae9d44c57a47022488a25c09b0135e6a27fd. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FR50X2287813.
Pa Pa Pa (Inspired by the Papageno/Papagena Duet from W.A. Mozart’s The Magic Flute)
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Velvet Valves (Six Romantic Trio Arrangements): Romance (After Georges Bizet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84782f4e7fc684bc375c9c8d23a12a2f65bdc398f3eff758d5e3542d0770c5. 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/FR50X2073204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506a52f2c02592e3300862b6348e90eaa3982781bb8ac7b314bc2cd936fff46. 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/FR50X2073211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81feda25a575b112749ef3ab7cde967fa424d24f9267cd0e06a04d9d2ff4a6c9. 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/FR50X2073212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1cf70aa4e0a957164ffaf86fb13fb9d17fb5635dd2118bfa7dc30dd0d6ee13. 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/FR50X2073213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c182653a97a443162ff738c6b71c17d51180e92a7a0e7e00c470226dc96ed9. 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/FR50X2073214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b4ad8abae00e7745a68aaa3e9e54874a643971718bc7c6a22f9a45ecf4b563. 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/FR50X2057802.
Horn Concerto in E-Flat Major, K. 447: I. Allegro
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Rondo alla Mambo (Inspired by the Third Movement of W. A. Mozart's Horn Concerto, K. 447)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6af3d22e8acc7effc60c72025ebd60c5691a8976048eaabf774de2b587956d. 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/FR50X2057810.
Concerto Movement for Horn in E-Flat Major, K. 370b
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Sarahnade mambo (Based on Eine Kleine Nachtmusik by W. A. Mozart, K. 525)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ff7c9b3387dcbe7dc83e3698dc30422828c917d079ee9b54e29eb65a710db8. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR50X2057804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9179461bc4d00d25e936db70950c3a41fa9c4a3ce9e6805292b8b8df99d7eeeb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:42:35Z), 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/FR50X2057809.
Concerto for 2 Horns in E-Flat Major, C. 56Q: I. Allegro maestoso
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Concerto for 2 Horns in E-Flat Major, C. 56Q: III. Rondo. Allegretto
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Concerto for 2 Horns in E-Flat Major, C. 57/K.III:53: II. Romance. Adagio non tanto
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Notturno in E-Flat Major, B. 27/K. I:58: III. Romance. Andantino
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Schumann: Concertstück for Four Horns and Orchestra, Op. 86: III. Sehr lebhaft
Strauss: Concerto for Horn and Orchestra No. 1, Op. 11, TrV 117: III. Allegro – Rondo
Weber: Concertino for Horn and Orchestra, Op. 45, J. 188: IV. Polacca
Sinfonia concertante in E-Flat Major, K.297b: II. Adagio
Horn Concerto in E-Flat Major, K.495: III. Rondo. Allegro vivace
Horn Concerto No. 2 in E-Flat Major, K. 417: III. Rondo (Allegro)
Cuban Dances for Solo Horn, Strings and Percussion: No. 5, Sarahchá
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Rondo in E-Flat Major, K. 371 for Horn and Orchestra