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 0xf42a4dc48d14552e1258cbb0f4e7df4d6e031e25a278f5cd90f76e9e556f8c17. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44a19c95-e945-4c12-815c-955af84e56a8.json and https://artists.proofprofile.net/proofs/artist/44a19c95-e945-4c12-815c-955af84e56a8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Beethoven: Complete Chamber Music with Flute
Flute Sonata in B-Flat Major, Anh.4: III. Largo
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 0xa4706a4945a242d433680801509700ed907efab10435b360f8a560dc2a62c247. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332300116 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159c851b5598baabc516eac0072190afe106c57eb54f463c0b43ba21c823c337. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600175 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99cbdad8ee6accd610e9d8f03277a4c94489bef6901f3c1b8153b5bda5a37e8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600189 — a six-check JSON result.
Flute Concerto in F Major, RV 433: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf3fe7b76bd75d13d7818b5397d5e2d570314d23efc287a5512af00e82d0c6e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703578 — a six-check JSON result.
Flute Concerto in F Major, RV 433: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9300fd8e49203559a01ea7c6a56e787b3a0383f6bd6b07e97ba54bb9eda37a2e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703579 — a six-check JSON result.
Flute Concerto in F Major, RV 433: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b9e5bdc1df601571096ef038b6f8d9effb97680bde298111fa24ef19b0731. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703580 — a six-check JSON result.
Flute Concerto in G Minor, RV 439: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0ce5fa1c21a668edcf4c7cd9a3ec1127d51019ab9d557e3ab46d5c5322e767. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703581 — a six-check JSON result.
Flute Concerto in G Minor, RV 439: II. Presto - Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89798987f07bd0727c75a97396a2d188581735fda05c9e81adcf0a87eee04815. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703582 — a six-check JSON result.
Flute Concerto in G Minor, RV 439: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603b237e2b6ebabb8f5e25295d6bf10c19ca31966a8e478f98f6e99123ba985. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703583 — a six-check JSON result.
Flute Concerto in G Minor, RV 439: IV. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f25e9f0cea1d86a757a06bcf511e76e17de391e3980a207ad1a666da0565487. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703584 — a six-check JSON result.
Flute Concerto in G Minor, RV 439: V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a4123c55cb031497df1d539c5797df39e4c31c1dc7c5db5e98636da6f82767. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703585 — a six-check JSON result.
Flute Concerto in D Major, RV 428: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892318053ac73ad08ae84668d2603f243ad4239c9918a2685cd8a05ec34a807f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703586 — a six-check JSON result.
Flute Concerto in D Major, RV 428: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8e1333612fe03257a475cd2b33a406a00931ce03a0369dbbab69d0d617cf8b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703587 — a six-check JSON result.
Flute Concerto in D Major, RV 428: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71beae539c561d51d771af67292196bce4c9534de0ce17831dcc9d7dcc9d0153. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703588 — a six-check JSON result.
Flute Concerto in G Major, RV 435: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad97732c315f7ff39ea7b45413d2c0967cc8136c04b526cb30340eaf80db1b6b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703589 — a six-check JSON result.
Flute Concerto in G Major, RV 435: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d932283de463090a40e6d5e564d7997591af87174a3ce7e4a1c2bc6c21e72. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703590 — a six-check JSON result.
Flute Concerto in G Major, RV 435: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97371ec6e5cb35213b77a3e43323959755f36883a1393e6e2e9c1c9af7708c7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703591 — a six-check JSON result.
Flute Concerto in F Major, RV 434: I. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fa174cd9e945f616726d51a1c7327ca15ec399212e14da3f94c4312d24a826. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703592 — a six-check JSON result.
Flute Concerto in F Major, RV 434: II. Largo cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb1939d8553a5f57b35d7e5ddff792cc16939cd1933d242383e432fda0a3bba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703593 — a six-check JSON result.
Flute Concerto in F Major, RV 434: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c887d481fa28fff00e04eff0d81b222267cc5e7139795a71ffc435fbec53be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703594 — a six-check JSON result.
Flute Concerto in G Major, RV 437: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf988e7a2533b2cacf5e3451694817955cceceb6c92ab4e526f559eb73cf03d04. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703595 — a six-check JSON result.
Flute Concerto in G Major, RV 437: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27954f4f59f9a430d5072dfd4b3284fea5e4104d73730fc5db11d2cfd180087d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703596 — a six-check JSON result.
Flute Concerto in G Major, RV 437: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d299b4b80d91aa0efc837426b622ef25d4f6639f999f5f519cb9c1050be514. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703597 — a six-check JSON result.
Flute Concerto in G Major, WK 50: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd6c7ce6901110ff2b78ec4bd8990fbfbfb506be0bd441ba554412ac529817b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703598 — a six-check JSON result.
Flute Concerto in G Major, WK 50: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf40b9a9e7c0369b75ba879defd04ac59239c13a671f82166c586514aa2788c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703599 — a six-check JSON result.
Flute Concerto in G Major, WK 50: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9a9a8c74d8476ffbd52ccb16a223f8465636b6e853764cf774e3b52022b4f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703600 — a six-check JSON result.
Flute Sonata in C Major, WK 123: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81d1ae15318e0c804363c7ed9bd32a0e2848ba26b2f16a8f1bca8567f091cc9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703601 — a six-check JSON result.
Flute Sonata in C Major, WK 123: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2e0beb640bccb85648de3c7a4f62a0797db79a5efde5a83b8bdf89ddb86b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703602 — a six-check JSON result.
Trio Sonata in G Major, WK 80: I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fedb31cdb48d77633f083addb7655776e96b94ca61b69033374e1c3cca6a07. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703604 — a six-check JSON result.
Trio Sonata in G Major, WK 80: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cef8bfa5cf9a8dfef45f6c95d843d3931ec2a4e9763a4d16adab3c215d6192. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703606 — a six-check JSON result.
The World of Yesterday: 20th Century Works for Flute & Piano
David Fontanesi: The Third Way (Chamber Music and Sonatas for Winds)
Fantasy Trio, Op. 26: I. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae8044b19f40931e837f92f2f368506dfb1e9aa37cfec3b23999d5ac625708a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703353 — a six-check JSON result.
Fantasy Trio, Op. 26: II. Andante con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb2bc90a819c56f41d4046eef411ff70d4aa6085688780ccb1a8e87b8487a7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703354 — a six-check JSON result.
Fantasy Trio, Op. 26: III. Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290229eb0a84f04a9ca348c57a761e96cb5a847d1839e5274af703cbc6f56e26. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703355 — a six-check JSON result.
Fantasy Trio, Op. 26: IV. Introduction and Finale. Andante molto e sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd938d83338809325a2e025318567d07f497facc1cfaa9cbe48198292a4ec2426. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703356 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45746af6216793ee223f8f962ca2e6e3326ae22ea151a13d80d2c364765b4f8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600180 — a six-check JSON result.
6 Romances, Op. 6: VI. None but the Lonely Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6903f27e6ae89451cfd43faeb1180ef1a6eee69d6d11bbe9d56535272a240408. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600181 — a six-check JSON result.
Dupuy & Büchner: Romantic Flute Concertos
HAYDN: Six Duo Concertantes for two Flutes
Briccialdi: Quattro concerti per flauto e orchestra