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 0x01c4d4e3a17f78ce5d5cb80052961f90814640fa506081ebd22c8818f4cf55c1. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c82a82-6aa1-4b03-bff5-8687c342bf3f.json and https://artists.proofprofile.net/proofs/artist/d7c82a82-6aa1-4b03-bff5-8687c342bf3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nancy Ambrose King Plays Oboe Concertos by Mozart, Goossens, Vaughan Williams and Martinů
Concerto for Oboe and Strings in A Minor: I. Rondo Pastorale
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 0x79bb621178eac37b1be57428f4725b7b223da66095ea86452440908063d43699. 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/GBLLH1901202.
Concerto for Oboe and Strings in A Minor: III. Finale: Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cee1f07fbaa9a882a3e53bc3d69095d2368407b3888d35d41c03063947dd066. 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/GBLLH1901204.
Concerto for Oboe and Small Orchestra: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478bac40218a703e1fac4fa1e68ac56c2bb90a27adbec0eeb0c3f7587f2b8060. 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/GBLLH1901205.
Concerto for Oboe and Small Orchestra: III. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea5cadd4b27dd0ee6c3940d5558b5c57df9f6a1d0735ffb4cb6bcf7a969acfe. 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/GBLLH1901207.
Oboe Concerto in C Major, K. 314: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d82fc5bb6623b63529a0fa91135d4a11a19ebbe87a807044ee1328394a80ef. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBLLH1901198.
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
Oboe Concerto in C Major, K. 314: II. Adagio non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8968f3e15837feaed4c907fd77b873afc7059056455917550423ad2ecd884e9a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLLH1901199.
Oboe Concerto in C Major, K. 314: III. Rondo: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c017272a260bebefc5caabd06e58db7800726ef14ca661ec896713fa831ac8. 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/GBLLH1901200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01935cb1ac988af6055a23929d4dec0a5b2181bde5ab88ea37933d8d9bb8db52. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLLH1901201.
Concerto for Oboe and Strings in A Minor: II. Minuet and Musette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb4760203b43a34ca4601731c47c5320161f1dd65c7320457d92d2575d99748. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLLH1901203.
Lebrun: Oboe Concertos No. 2 in G Minor, No. 7 in F Major, No. 3 in F Major & No. 1 in D Minor
Trio for Flute, Oboe, and Piano: II. Andante semplice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d2db531f33ea524aaee0d583ba3e7d5746ad0c9677ff8016d281dca0ab566. 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/QMZ621900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465acbc2d7dc87f5db0e4810a609683532cbb242266212b588e0ba83948e7b25. 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/QMZ621700398.
Krommer: Oboe Quartet No. 3 / Oboe Quintets Nos. 1-2