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 0xdd88328bd25fbe04428297fa75821478b8ba499f702ff0cc3fde5f1a84e4b2e5. 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/a09c1cd8-106c-4d0e-b4fa-a23434abb15c.json and https://artists.proofprofile.net/proofs/artist/a09c1cd8-106c-4d0e-b4fa-a23434abb15c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Die Zauberflöte, K. 620: Overture (Adagio - 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 0x62a530551ee276b6df1bf9fb25aee294098565bb01757a912cc89c873faa7a61. 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/GBAYC9005497.
Mozart: Symphony No. 40 in G Minor, K. 550: I. Molto allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f91c5fe09c224962eb19d3afa59a70b185359eb9748c5bf4480abb4638b5567. 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/GBAYC9005814.
Mozart: Symphony No. 40 in G Minor, K. 550: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a92c3591cab21b3541c23606ede33ff428d7417b860aa0999477d32284b0ba. 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/GBAYC9005815.
Mozart: Symphony No. 40 in G Minor, K. 550: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e7e40ffb2cbaa3e43fe19a66b28215f6673c485cc3e944de8aeebb152cc281. 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/GBAYC9005817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67370c8e0c835fbaec64c89565428766022808f5a941281af8de2b6e4ff3a07. 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/GBAYC9005503.
Lennon / McCartney: The Fool on the Hill (Arr. for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118bdd7af55dd4c5dd76cb1de774838a157be3520a3bf7ddda01226da250ed7e. 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/GBAYC9502903.
The Swingle Sisters: String Quartet No. 14 (After Mozart's String Quartet No. 40 in G Major, K. 387 "Spring")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86ccaa12ed13bca8e3eca5d7dd4f3cbfb1d37902370efdc74bfe57ddccad7d. 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/GBAYC9005499.
Mozart: Così fan tutte, K. 588, Act 1 Scene 12: No. 17, Aria "Un'aura amorosa" (Ferrando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3699e8d00b826813da298af49c3d5d3f031db6d69e7ac1feb5b17ea14f2d4330. 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/GBAYC9005818.
Lennon / McCartney: Blackbird / I Will (Arr. for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e732304db3742240295b911cf4a7eb5329ab6fb93f896391e7e729eaa310da3. 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/GBAYC9502906.
Bach: Brandenburg Concerto No. 3 in G Major, BWV 1048: I. (without tempo indication)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d40bb805463d49a9d81f02efad38e21c18f5fb61075cce4f8063bad7c36f810. 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/GBAYC9100972.
Mozart: Don Giovanni, K. 527, Act 2 Scene 3: No. 16, Canzonetta "Deh vieni all finestra" (Don Giovanni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f54874dcf8c1fdf2175114eb5c7366e0d8677347a9ecab0e3519dc2edc6f94. 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/GBAYC9007458.
Gershwin / Arr. Rathborne: Porgy and Bess, Act 1: "Summertime"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc97f2049d0bc75a8e3ea77cf043414bec6547b0068e7aa8196bcd3ac7fb5514. 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/GBAYC9502653.
Bach: Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82fcef786d5f8096fe492b1f591f407ade77a7b4733d30c1e3b38a7b0d1ea51. 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/GBAYC9100974.
Mozart: Requiem in D Minor, K. 626: IV. Offertorium, (a) Hostias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b229e689d366fedd2bba1625deb3cf6ec9a7b99ed9c326e241734e289af2ab. 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/GBAYC9005509.
Mozart: Piano Sonata No. 11 in A Major, K. 331/300i: III. Alla Turca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cee4f9e7754ee4a81eb6995ed7b51b1b87ffd18c2158fea9ff9fe9189297f3. 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/GBAYC9005502.
Bach: Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a3a5a9559a621c58aef1154be47bc64da0ca308be5b94d1109994c92adfdbc. 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/GBAYC9100981.
Bach, J.S.: Fugue in G Minor, BWV 578, "Little"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4a9bdbe398ceaa2ed77786ec2def1df8c87ddcc56d044cc26aa0b31d825fc4. 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/GBAYC9100982.
Rossini: Guillaume Tell: Overture (Excerpt) [Arr. for Chorus]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b135fa06332d9d79fe23f5ac1e67c9ab8000760b062ff4b9185ee17ccfb10. 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/GBAYC8805317.
Organ Fugue (After Fantasia and Fugue in G Minor, BWV 542 "The Great")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6727582565a16858e9b4574bdb56b6e1bb273e9300001e815b672b0ba9736f67. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC9100964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cfdc24f9905ecf2f1bda35739b7ecf5cfd76203a528598011e3921a3478ea5. 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/GBAYC8805318.
Mozart: Symphony No. 40 in G Minor, K. 550: III. Menuetto (Allegretto) - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c24391f687ff9536dd65f4af03a67d311364bceec990b5d8360c3b6556251d0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBAYC9005816.
Bach: Liebster Jesu, wir sind hier (Choral Prelude), BWV 731
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da31f3dc13804db70364f06b58f06641db0e3b487fd2ed043cabd5df16608ce. 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/GBAYC9100968.
Mozart: Eine kleine Nachtmusik, K. 525: IV. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd760cef6ea0b809409f59f0cd317ce4718619643b0fbfed8753664d8b920db55. 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/GBAYC9005504.
Bach, J.S.: Solo Violin Sonata No. 2 in A Minor, BWV 1003: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4ac8c4308bb4520c29d6b486dc5841599b456bcf7e2bbe2b8e7635c8f8a67f. 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/GBAYC9100971.
Mozart: Horn Concerto No. 4 in E-Flat Major, K. 495: III. Rondo (Allegro vivace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac3e1078f12d9e34a02128b213f56883602c3770d2204913d1fb0187d8b44b. 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/GBAYC9005500.
Mozart: Così fan tutte, K. 588, Act 1 Scene 2: No. 10, Terzettino "Soave sia il vento" (Dorabella, Don Alfonso, Fiordiligi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafa85a6ccda0e1cf418e717fba4ad52b34161431f6394b6e8e75daf8d26d783. 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/GBAYC9005501.
Mozart: Piano Concerto No. 21 in C Major, K. 467: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10a3f4af1013d534fb11a9bb080bacae23f1dbdfd2984cce2bf0dd14da5c897. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC9005507.
Bach, J.S.: 15 3-Part Inventions, BWV 787-801: No. 11 in G Minor, BWV 797 (Arr. for Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb176a14fad3e1e40c7b7cb4fab136bb6cd3b59ef6d948beed85658294dd62a8f. 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/GBAYC9100976.
Mozart: Requiem in D Minor, K. 626: IV. Offertorium, (b) Quam olim Abrahae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2d3ab9a09a9b4efca54887354e1d2200845ed55561c0fe0c14b07f9078fcf2. 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/GBAYC9005510.
Stölzel: Bist du bei mir (from "Diomedes")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa00d3dee99fc404a8249a9853b57cff63a2e20b98be822cf46247e13b52e55. 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/GBAYC9104562.