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 0xbcf119fabfd14ae6ee89cdb138b354b0df49da00b7983ce3d1a16e53cf58cf61. 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/8bc89288-d2f5-4462-aa8a-00e1df3ae90f.json and https://artists.proofprofile.net/proofs/artist/8bc89288-d2f5-4462-aa8a-00e1df3ae90f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le Quatro Stagioni, L'inverno - Winter, I - Allegro non molto
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 0x185bf77be1cb8bfcab99c18e6cd19acdc9e1729c573419704d66b4563fe57fa8. 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/GBCRW9636910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60b26b8081d99a9de2bc9849444827fc266bbc7204accbf195a8ee1bc419835. 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/GBCRW0571208.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0e0fe66c22f521b6e5a85541c4980f9a7ed83ddf89774abaf2fbc4bf1da75d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI199590401.
Ascanio in Alba, K. 111: Act I Scena 5: Aria - Al chiaror di que'bei rai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d095ee475cfc04cc8aac4dc700587263205dc25daef46b7cb8de7b12db4d55. 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/HKI199590501.
Ascanio in Alba, K. 111: Act I Scene 1: Coro di geni e grazie - Di te piu amabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0b178b0d17cb829738aeebe90b5191da7ab63dad8c51f40196d8704f291c9. 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/HKI199590407.
Ascanio in Alba, K. 111: Act I Scene 2: Recitativo - Perche tacer degg'io?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc4785650fbe69fcc8481e52c8b323978f7b6ee93ad366c8403f8d47b65b47. 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/HKI199590408.
Ascanio in Alba, K. 111: Act I Scene 3: Recitativo - Ma tu, chi sei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d88a803d2b11eef10d2bab451cf3df9ec5bd428ef201dfae8379920061c06c0. 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/HKI199590413.
Ascanio in Alba, K. 111: Act I Scene 4: Recitativo - Oh generosa Diva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22547ed6497362fe6e2cb29aac448993f12dc4348a719e5aa6b88424fc8c28. 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/HKI199590417.
Ascanio in Alba, K. 111: Act I Scene 4: Cavatina - Si, ma d'un altro amore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98069b962d00c6a79aeeb74756fb1f57420227d967b18c5e60bb57d0cd9832f1. 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/HKI199590424.
Ascanio in Alba, K. 111: Act I Scene 1: Andante grazioso, che ballano le Grazie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343fa16e228bef76309d676849adfe5a84fa30b9e7faa94a59de3c039b449c89. 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/HKI199590402.
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 0xc0748a3cdd9df5a0044b45e57be0a7e479f4d618d59be676454e28c5bdc06e33. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKI199590403.
Ascanio in Alba, K. 111: Act I Scene 1: Recitativo - Geni, grazie ed amori
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9756babba8bc190d69048cd79f4a0090d511b1d861056f34e666192340f750fb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI199590404.
Ascanio in Alba, K. 111: Act I Scene 1: Aria - L'ombre de'rami tuoi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea04f9bbce6423936e4db3727e70880057003484b2d9b55e854e5c3831850f5. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKI199590405.
Ascanio in Alba, K. 111: Act I Scene 1: Recitativo - Ma la ninfa gentil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f2b98e6cb2c9cbe9e61d846b3864f22fb8bc7dc67060912eaebc0927d69f2c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199590406.
Ascanio in Alba, K. 111: Act I Scene 2: Aria - Cara, lontano ancora
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0075c6f8ee2f22f8f94a3d36d4a774775977804e4feea9a020a76d89f276bf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/HKI199590409.
Ascanio in Alba, K. 111: Act I Scene 3: Coro di pastori - Venga, de'sommi eroi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1a56c7dbb60edec19196fba93ef71e1b3df7feb8e976ce5b42728bfb4c1513. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199590410.
Ascanio in Alba, K. 111: Act I Scene 3: Recitativo - Ma qual canto risona?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73be8839372fa647493cc50a02a2c0454caefcf5a85af9121dc3b3023754eb16. 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/HKI199590411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5518a7cf680c721c106b437fb6c43f8d505ff3c7c60636bdbe37ff85f5fafba. 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/HKI199590412.
Ascanio in Alba, K. 111: Act I Scene 3: Aria - Se il labbro piu non dice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33451ec250e5beb7b3598644262fb2f27db6b51d761b4b00c9c978f1bee6e7ff. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HKI199590414.
Ascanio in Alba, K. 111: Act I Scene 4: Coro di pastori e pastorelle o ninfo, e ballo - Hai di Diana il core
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233c32e97d65c8151ff5d7eef340d26abec69dd3af9fd5ab04b61b3ec6f765aa. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/HKI199590416.
Ascanio in Alba, K. 111: Act I Scene 4: Recitativo - Di propria man la Dea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e3b9b577507d7d156e29c5718dae3e40c04e4268c432bb88600b204f10313d. 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/HKI199590419.
Handel in Italy: Cantatas, Arias, Serenata
Il delirio amoroso in D Major, HWV 99: I. Introduzione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e459c0a5c6aecd9fc50aaaa6051e067095286e8925bbef918f0d568fcb529b. 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/NLY331704409.
Bach: Complete Keyboard Concertos, Vol. 20