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 0x5f57e4fd4404f66d0dd2de23532769ebada52a2c40b8fc6bca39b2d70d030a19. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a67683f-2d44-4f2a-91a0-58b8245d8a8f.json and https://artists.proofprofile.net/proofs/artist/5a67683f-2d44-4f2a-91a0-58b8245d8a8f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Arnold Griller: Orchestral Music, Vol. 3
Casta Diva - Operatic arias transcribed for trumpet
Zaira, Act 1 Scene 2: Liete voci! (Arr. for Solo Trumpet and Reduced Orchestra by William Foster)
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 0x399c836a61b32a04c6ad61479b4773c1b3f1f9e2e055bf26c80772adf46f1612. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302101 — a six-check JSON result.
Zaira, Act 1 Scene 2: Ah sì, questo di mia vita (Arr. for Solo Trumpet and Reduced Orchestra by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21690b7f33cb5d1fb878618f3881129d207ec464e3af4c0f8ae2b8c8fdee8b08. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302102 — a six-check JSON result.
Variations on a Cavatina from Bellini's "Beatrice di Tenda" (Arr. for Solo Trumpet and Small Orchestra by William Foster): Variations on a Cavatina from Bellini's "Beatrice di Tenda" (Arr. fo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d3802beaf04cc763d8e24f1b06f10262199097060b37cce3367bba838f88f0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302104 — a six-check JSON result.
I Capuleti e i Montecchi, Act 1 Scene 4: Oh! quante volte (Arr. for Solo Trumpet by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf22c93b402743ea1d923cdc8ed08a7ea31840ae445f6fbcc1bf838b5117e68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302105 — a six-check JSON result.
Variations on Bellini's "Norma" (Casta Diva) [Arr. for Trumpet and String Orchestra by Mikhail Nakariakov]: Variations on Bellini's "Norma" (Casta Diva) [Arr. for Trumpet and String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1dc02232b9299f8d674c609e809506e7713430dbb59c71b1c2238e8ad8cdf3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302106 — a six-check JSON result.
La festa di Piedigrotta, Act 3: Tarantella Napoletana (Arr. for Solo Trumpet and Small Orchestra by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc2da8411482aea7d90f92aef15ab1501583db15de5a5c44f040438cb74512. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302107 — a six-check JSON result.
Le Dernier Sorcier, VWV 2002, Act 1 Scene 3: Chanson de la pluie (Arr. for Solo Trumpet and Small Orchestra by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c236375e4efa55df6b92d1727ef53ec68832baef35ebc90291bc1b0c2ffe51c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302110 — a six-check JSON result.
Prélude, thème et variations (Arr. for Flugelhorn and String Orchestra by William Foster): Prélude, thème et variations (Arr. for Flugelhorn and String Orchestra by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3585a0f9852db29909c58c734f8d2734acd4872472aec966d9e9775bdc01cb. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302111 — a six-check JSON result.
L'elisir d'amore, Act 2 Scene 8: Una furtiva lagrima (Arr. for Solo Trumpet by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32daed8745bd9c947611025b77f54db56d2da85124520bcb69ed9ccd39924b00. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302112 — a six-check JSON result.
Don Pasquale: Prelude to Act II (Arr. for Solo Trumpet and Reduced Orchestra by William Foster)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc710228ad77f10a31ea026d2f15891eab2db23441109eb3ff9a36f35395bc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD2302113 — a six-check JSON result.
Direct Message: 20th & 21st Century Works for Trumpet & Piano
Ricci: La festa di Piedigrotta: Tarantella Napoletana
Viardot: Le Dernier Sorcier: Chanson de la pluie
Bellini: I Capuleti e I Montecchi: Oh! quante volte
Mercadante: Zaira: Ah sì, questo di mia vita