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 0x85deea3a95f100f0e3add21b4dd89a979c735cd1349817cb01b872097ffea758. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26b5800d-6bc0-4241-a74f-8a83d5745ed8.json and https://artists.proofprofile.net/proofs/artist/26b5800d-6bc0-4241-a74f-8a83d5745ed8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb624e7d05191504ead1ebd1909dbeaa4b2c7fac64ddc5bddf6e0c42d875d71a6. 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/GBLWD1602908.
Tema con variazioni for Clarinet & Piano: Tema. Largo - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079114e27dd49ae4f3d0e13e943b2403f26e7e3678fa5c409f71dfe10b1f5f3b. 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/GBLWD1602909.
Tema con variazioni for Clarinet & Piano: Variation I. Larghetto misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f0c8c04c0083f84bae4c05e7af12288f7c2b3fcb56ece6e996d6c1fd3a664. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLWD1602910.
Tema con variazioni for Clarinet & Piano: Variation IV. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4904021496bc4bcf8e5332d4a32f3c54781f1d983726397ffdaf1cf93d82207. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBLWD1602913.
Tema con variazioni for Clarinet & Piano: Variation V. Tempo di Valzer - A Tempo giusto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ef713251b4647ad183155a45edb678b738eab1c0a67fc7894689ea1798917. 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/GBLWD1602914.
Thaïs, Act II: Méditation (Arr. for Clarinet and Piano by Michael McHale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0d1c3d24c714687d0717816fc21aa2ef73395177fd9ead929c1a6858e37b75. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBLWD1602917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61853375b326de7ebef54c6b37433adb62ba83bb49ae163daf3e9002aa2fa63. 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/GBLWD1602918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6209012ad6c6b9ca7b0b039751fa2214a8258debc65f4bb131cfaf419b3c78ee. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLWD1602919.
Sonata for Clarinet and Piano: III. Rondó. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf286e08c221c65d44170ae08b1ff27bbb8aaf6d06bf48381a82d33653226376. 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/GBLWD1602922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c4fada4b237b28518892d749fbb0aa380b6b7f35c8921c4d0d58f0fa31927f. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBLWD1602904.
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
Tema con variazioni for Clarinet & Piano: Variation II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a01f2b49b5d5e6468aa62fcef172cec249ac8236a184d2f8051b4d134bd4951. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLWD1602911.
Tema con variazioni for Clarinet & Piano: Variation VI. Prestissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c29da9d66364609b9dcbc339ecdffeacfd4bf3f21476e9ede5a2367953de0b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBLWD1602916.
Sonata for Clarinet and Piano: I. Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5455d1e7b967e1dd7e22d95f203f471ab5d5bec46e7485ef74c87e20593819a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBLWD1602920.
Sonata for Clarinet and Piano: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f78eaaa17ea31f48935151b90975e288d065c735191f4364c74d9003d61316. 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/GBLWD1602921.
Brahms: Clarinet Sonatas - Reinecke: Sonata Undine and Introduzione ed Allegro appassionato
Eidelman: Symphony for Orchestra and Two Pianos