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 0x085e14bb6934a112516a10cf88a475129a0e8cda999e4624f6aed0fb42c11d02. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3592fcd7-b471-4c05-917e-ed2495126208.json and https://artists.proofprofile.net/proofs/artist/3592fcd7-b471-4c05-917e-ed2495126208.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart - Beethoven: Quintets for Piano and Winds
Charles & Frédéric-Nicolas Duvernoy: Clarinet Chamber Music
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 0x63e11baee4152fc96e43c9df672cf99d4d358f60ac926779da4a1de5a9d582d0. 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/NLY332203487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6f5c210613be2b653e2d3872a8ee59286802b3f655910aca5c883bc78a0e1. 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/NLY332203502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab187fb72b5e8a0f286d41b4579414f4d3caf45e37961d20d601d78b28cf44f. 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/NLY332203501.
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
Mozart - André: Clarinet Quartets Op. 79 (After Mozart's Works)
Cesare Pugni: Three Quartets for Clarinet and String Trio (World Premiere Recording)
Concert for Clarinet and Orchestra in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed931c51855665c0f7488a182538ae614a629f0f8de20e55f3dbba6aef74cdc9. 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/ITK601801001.
Reicha: The Complete Chamber Music for Clarinet
Duo for Two Clarinets in C Major, H.636: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baed724ba4d32190c7d394d85489f177e5861a7f6f3ff518a51b6078d1ebb91. 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/NLY331600207.
Divertimento in G Major, H.642: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e123a74d6fa51c617dc1727f59ee494722f957373276877762439837d69552. 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/NLY331600194.
Divertimento in G Major, H.642: III. Rondeau in tempo di minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730b86052fd8171ead3aa2034122700a9f76f7bab08d0a495863dd50f2e7e7cb. 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/NLY331600196.
Mozart & Stadler: Clarinet & Basset Horn Chamber Music
Mozart & Sussmayr: Pieces for Basset Clarinet and Orchestra
Gioacchino Rossini: Chamber Music With Strings and Winds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1cc5525136899e16bc4121ad1881386f34ea923909103cfdaee55cf11df169. 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/CH1401035402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf2a04802a9df6801b3a91d2bfd1610bd27932084f16eb56e1b06db3ac2b1d9. 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/CH1401035408.
"Septet" for Two Flutes, Clarinet and String Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ceeb2f9518cbbdec76ea30200479382d2887f33cc2b469656b3571082d617. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CH1401035401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb58b1dc878549dc25b0a8d4ac451c807ef0021ae1a79a03dde485f6b3005ff6. 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/CH1401035405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc04fa8506dd70811b2b336202ad91271560c1b5ed4244ba7e43fc645686651e. 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/CH1401035407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe39b4d14bfaeb94d41fa0994873c21f3117d1e224eac2f7ee8d0b3a3f1c50c0. 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/CH1401035409.
Bohr: Rondo Fresco Ungaria per corno di bassetto e ottetto di fiati
Peaceful Clarinet: The Romantic Collection
F.X.Pokorný: clarinet concertos and chamber music with clarinet