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 0xdc5a6f9ff861bde40468b09dccd05ee408fb90a730b8db42d35309a167745990. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9702c6a-5753-411b-ac78-875bef3bed56.json and https://artists.proofprofile.net/proofs/artist/b9702c6a-5753-411b-ac78-875bef3bed56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arutiunian, Peskin & Desenclos: Trumpet Concertos
Trumpet Concerto in A-Flat Major: Andante - Allegro energico
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 0x54cf96248941094d7d089787c353a4bec30aac07525757177e2dcc228780ee78. 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/DEB952000901.
Trumpet Concerto in A-Flat Major: Tempo I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb125fd15f1b14cd49a246e254312751761ee5bb8cace724d1b0530290817ef0c. 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/DEB952000902.
Trumpet Concerto in A-Flat Major: Tempo I - Coda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d309a5836a3d7547641ac2bddc58d304c90b93f74ae48a6b9ad888da90e6623. 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/DEB952000904.
Trumpet Concerto No. 1 in C Minor: I. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba9544de8b41d1f36f50601150206245ba2788d5484d2b8b5de08a35f981ae. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEB952000905.
Trumpet Concerto No. 1 in C Minor: II. Andante sostenuto, dolce amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7757d6fd6fa1ea5345fc1c7f7f788c4be1e109691800a55b2cdb94a758161a45. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEB952000906.
Trumpet Concerto No. 1 in C Minor: III. Allegro, scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fb449a9ce60020bc438cbb7139dcfb683810add4abf92835e214858344c09b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEB952000907.
Incantation, thrène et danse: I. Incantation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca7a24572db67c9170004dcc82245c423b55491da8616ee7fc96c13c9277ae6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB952000908.
Incantation, thrène et danse: II. Thrène
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf601e3ad3d917e55fe41bf4b13c45278886bd541541c135a4f5b439b372e1f. 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/DEB952000909.
Desenclos, Vasilenko, Glière & Others: Works for Trumpet & Piano
Shostakovich, Weinberg & Jolivet: Concertos for Trumpet & Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16654d910d4ea84f407d1609c0c85811bd893291df99898e361bb946255a70e. 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/ATP571096090.
Concerto for Trumpet & Orchestra in A-Flat Major: III. Meno mosso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f6a41cf2ddc0a86d7d664ec9dfc84e1d6aa7d83cb019ecf791a579c5a7229. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB952000903.