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 0x2aa8c69d2e8df1e1e82222b36915ebb5b01d6747fab3c6616c21dc9cb828e707. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/345c8dcd-0157-432a-b82a-b640057f4e74.json and https://artists.proofprofile.net/proofs/artist/345c8dcd-0157-432a-b82a-b640057f4e74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart's Bassoon. Works for Solo Bassoon
Barsanti & Handel: Edinburgh 1742 (Parte seconda)
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 0xc07f5e7dbc366e7849953f9081dc605fe0d3d476506289f6204281f2a318f91d. 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/GBASH1756719.
Concerto grosso in D Major, Op. 3 No. 3: I. Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb871f9fdccba7cb66815bbbd04018e5c1bf1112eb0869d6ac7292e431091b662. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBASH1756701.
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
Quartet in G Minor, FWV N:g2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edbebfa5668243c9b51c4d845aea4113d165a0c468ea1b326cd6600927b525f. 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/GBASH1446710.
Quartet in G Minor, FWV N:g2: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f79e6c7a37f7a0ffa22154987c41e475149e3fcdb3c81557bdb32471cd6b85. 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/GBASH1446711.
Quartet in G Minor, FWV N:g2: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44951c786593736f18edec1fc59b2bca4d50f8caf3c6c5fc5b35115c80a0f8e1. 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/GBASH1446712.
Quartet in B-Flat Major, FWV N:B2: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318e764df38bebdd069820c153ce8f95d27ab77e507bb706dc1959050b47c08. 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/GBASH1446701.
Quartet in B-Flat Major, FWV N:B2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670f2990111ecdd2f442657ca7ca487e16be02fd8fff1b423f32a1dc556039c0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBASH1446702.
Quartet in B-Flat Major, FWV N:B2: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3393de7a5dc4e5c292dfa78f9f6cdae2e6e7190e710191773dc5970f623106bc. 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/GBASH1446703.
Horn Quartet in F Major, FWV N:F3: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9450f0b38fb65e0dd0ef0968ae4f1b8b63f977cecf8ffaeb1528af0147d0b43b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBASH1446706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee911c49e91bce8bec23d6972e388a15271c120773bd1947bfb3bf7b84639546. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBASH1446709.
Bassoon Concerto in C Major, FWV L:C2: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2201b1fabfd928aa2882f59b7d748df8aadaa8e347da6ce4d2b2d40fd13accce. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBASH1446713.
Les Gentils Airs - Ou Airs Connus, Ajustee en duo, pour basson seul accompagné d'un clavecin: I. Les Sauvages - Arr. Jean-Philippe Rameau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe95d6835e12c89650ec9b4ee28a2f623a84124904b617d8616444787d7033. 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/GBASH1443501.
Sonata in G Major for Bassoon and Continuo, Op. 50 No. 2: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e7018501f59292a74964a0b92a18a5a77e85cdc0e6f598ba8aad7717b07798. 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/GBASH1443504.
Sonata in G Major for Bassoon and Continuo, Op. 50 No. 2: IV. Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817ac0503c62aad1f1c90717675f0197b079bc43afa3a835ff1a4944f270402. 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/GBASH1443507.
Sonata in C Major for Bassoon and Continuo, FaWV N:C 1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f4ae3ab38a6ab48a01bb2c3e10cb3cf77cb933e1ab81d3e0c1329557ee724d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBASH1443509.