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 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 0x6616810e2faae36f78854612948650ec8f364eb8e4935fc15771216c6c09669e. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ffb44ee-3c5d-4ef2-aa61-d0e5ece8d04d.json and https://artists.proofprofile.net/proofs/artist/0ffb44ee-3c5d-4ef2-aa61-d0e5ece8d04d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weber: Complete Chamber Music for Clarinet
Clarinet Quintet in B-Flat Major, Op. 34: I. 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 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 0x810de05184723b2b1838eae48bc39dda86f9891ed713e67a55bebbb650ced6fb. 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/NLY332102701.
Clarinet Quintet in B-Flat Major, Op. 34: II. Fantasia. Adagio ma non Troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4217d47f1fd33c20b9a9fe62626b68f0c431af719decb444f911553a207387. 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/NLY332102702.
Clarinet Quintet in B-Flat Major, Op. 34: III. Menuetto. Capriccio Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64364e47c9c311c3566338668cd8d26251716054f4aefde971807b3228cd51e7. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLY332102703.
Clarinet Quintet in B-Flat Major, Op. 34: IV. Rondo. Allegro Giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462594d422d915c1f3dab83f48910cce7793aab5d68e2fee8b711d0dcbc28e4f. 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/NLY332102704.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: I. Andante con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ef6b2900e83c8422add6a7b349e95d33a0a208d3ac507d6273566d89cb463. 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/NLY332102705.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: II. Variation I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa141fa3fc75b8012d80f8c999248881e5c881cc59367a1d86d291444cfc4f1d8. 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/NLY332102706.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: III. Variation II. Con Grazia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2f09981b340cb16e35eefca40bb7c2720139666e21549a7fc9a4585930a04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLY332102707.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: IV. Variation III. Poco Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813703d7b70737d71eb6c31adf58e6526e577740d97d8748677e66ffc1c217a8. 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/NLY332102708.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: V. Variation IV. Tempo primo animato e con fuoco variation V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8067388a687095522ec3f92cf5a92680a277515d4c46547d3de4b91d6bd91. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/NLY332102709.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: VI. Variation VI. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2356e3c94aa88b4fb7e0aa3dc8f7a887841801a9c8d290f089a52a0888418e6. 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/NLY332102710.
Variations on a Theme from the Opera Silvana in B-Flat Major, Op. 33: VII. Variation VII. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8e708c70163b5269540210f1577547adbdc70b2522301b7ced2da2e98417e5. 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/NLY332102711.
Gran duo concertant in E-Flat Major, Op. 48: II. Andante con Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe9f2630ba0166cb2239635b9de5f89fd223a88cc38bb96d0398eadd249d998. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLY332102713.
Peaceful Clarinet: The Romantic Collection
Schumann: Complete Piano Trios, Complete String Quartets, Fantasiestücke, Op. 88
I maestri del colore (Jewel Case Standard Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c595aa7db56cb1ab4a1af944669b56dea1e978d6d4fc0e6fa31920360ee23be. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR2X41603086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3661902eabca1a3eca367b64539c00a224812df61fa1ddf55dbfe675e71ce8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR2X41603087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4bcc8bc6550cf19d62c6eaca0eed3834757c3322f92d3da3d7d1cf3ef106fd. 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/FR2X41603090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932d10fdd88b5fd5b2cc1697137546775766e4054dfc314eb37b7b645323ae2. 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/FR2X41603094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e02974ee0a508032268d6e695d4a86009e2b06ec93ebb3e1f8866c8a095646. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X41603097.
Hindemith: Complete Chamber Music for Clarinet