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 0xf42a4dc48d14552e1258cbb0f4e7df4d6e031e25a278f5cd90f76e9e556f8c17. 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/44a19c95-e945-4c12-815c-955af84e56a8.json and https://artists.proofprofile.net/proofs/artist/44a19c95-e945-4c12-815c-955af84e56a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Complete Chamber Music with Flute
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 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600189.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600175.
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
Flute Concerto in G Minor, RV 439: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9603b237e2b6ebabb8f5e25295d6bf10c19ca31966a8e478f98f6e99123ba985. 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/NLY331703583.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703587.
Flute Concerto in G Major, RV 435: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97371ec6e5cb35213b77a3e43323959755f36883a1393e6e2e9c1c9af7708c7c. 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/NLY331703591.
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 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/NLY331703592.
Flute Concerto in G Major, RV 437: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27954f4f59f9a430d5072dfd4b3284fea5e4104d73730fc5db11d2cfd180087d. 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/NLY331703596.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703597.
Flute Concerto in G Major, WK 50: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf40b9a9e7c0369b75ba879defd04ac59239c13a671f82166c586514aa2788c. 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/NLY331703599.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703602.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703604.
Trio Sonata in G Major, WK 80: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cef8bfa5cf9a8dfef45f6c95d843d3931ec2a4e9763a4d16adab3c215d6192. 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/NLY331703606.
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 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/NLY331703353.
Fantasy Trio, Op. 26: III. Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290229eb0a84f04a9ca348c57a761e96cb5a847d1839e5274af703cbc6f56e26. 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/NLY331703355.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331703356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45746af6216793ee223f8f962ca2e6e3326ae22ea151a13d80d2c364765b4f8. 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/NLY331600180.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331600181.
Dupuy & Büchner: Romantic Flute Concertos
HAYDN: Six Duo Concertantes for two Flutes
Briccialdi: Quattro concerti per flauto e orchestra