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 0x638ade1189ef7adccd1c436a9e7c2a1ca13771242594af905c1c54f520fc2fd9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0e32407-27cf-4b53-bae6-0528b8d9f514.json and https://artists.proofprofile.net/proofs/artist/a0e32407-27cf-4b53-bae6-0528b8d9f514.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Concerto in D Minor for Oboe, Strings and Continuo: II. Adagio
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 0x3d00b729b45a4817f90373f1e5095419e52f18f99cdea3d20f8ed7e59e07e45f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404912 — a six-check JSON result.
Concerto-Pasticcio in C Major: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58843b095ef38e3c903149316a66d6e56006bd30315f67d14555ef544be74d27. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332103394 — a six-check JSON result.
Oboe Concerto in G Minor, BWV 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b6d2fe30f4fc560ee5b6ff563b34f28bd711609ac3f13ff1171edaab2ab5a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404295 — a six-check JSON result.
Oboe Concerto in G Major, TWV 51:2: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35225ca90482f8662083806ae419efaed417ccd5b0cd687158aaec7ce4a2dc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331603485 — a six-check JSON result.
Concerto a cinque in D Minor for Solo Oboe and Strings, Op. 9 No. 2: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de5456ebc1bac4e2cb03c4284cc8ab3b49b9659d140dc0c4f10ac548a285c35. 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/NLN580565173 — a six-check JSON result.
Oboe Concerto in C Major, RV 449: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6555dc0a2db69a779aeeeed02f1ba6017c925f1d62c40032da85e23e814bf62. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLY331401920 — a six-check JSON result.
Oboe Concerto in G Minor, HWV 287: III. Sarabande. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f80c617766a6876265f7707e94554f2ac8e9354882273c73bd8e98957a793b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332103398 — a six-check JSON result.
Concerto in B-Flat, Wq. 164: II. Largo E Mesto, Con Sordini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d8a765ed4618d2f3b7f1a939f655e2f8d5f495a499e2baa3f7cb050e098d9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331208351 — a six-check JSON result.
Concerto for Oboe d'amore in A Major, TWV 51:2: I. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e821b30d54d4612fbb2a7cc08e2fbe47e084acca90b1debdf34a38345d7226. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/NLY331603493 — a six-check JSON result.
Oboe Concerto in F Major, BWV 1053: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd4300cdca8c1f327a5a476317fdc1b589a7b1c613e565d869cc1d3e40dd06c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404289 — a six-check JSON result.
Concerto à 5 in C Major for Oboe and Strings, Op. 9 No. 5: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a79704cb6c5edfd9e8afa2be5218055eff4edf03f218f65f84ea1262f7f5b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/NLN580565188 — a six-check JSON result.
Sonata à Oboe, Violoncello e Basso in G Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d974a249af43474987829fdf798dccbb58122279693a985d1751a720e9f5a5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330902163 — a six-check JSON result.
Oboe Concerto in F Major, RV 456 "Harmonia Mundi": I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dc08d7fc0e35ad562736948f514d9a84b53e9006eb4da45ef69c112c874573. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331401928 — a six-check JSON result.
Sonata in G Minor for Two Oboes, Bassoon and Basso Continuo: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c1d36c9a6867ecc93204495445cd78712ca942ff86702b090bf20fcd5ca949. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331305780 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994bc1069770ff884b9856b56fb7a45c5d882d759ab763cd265b6a038b18f1e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332103401 — a six-check JSON result.
Concerto for Oboe d'amore in A Major, TWV 51:2: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c631436ebf724daf052dbd39908869c0e5944a946970c66b4f010b482e84c6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331603495 — a six-check JSON result.
Concerto for Oboe d'amore in A Major, BWV 1055: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f589a481007c23b69ad38c1d47509f5bc1d10b153c60287a95d0226c9df7a30. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404292 — a six-check JSON result.
Sonata da camera in B-Flat Major: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54de56567c756c5d5fe027155d42def6413f1ff23121cfbbe091dba6ce87ee6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332000257 — a six-check JSON result.
Oboe Concerto in C Major, RV 450: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa409d99d7a89e473c3beaa80b97f444afd5159d0e68175151fdb1660a7b810f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331401944 — a six-check JSON result.
Oboe Concerto in E-Flat Major, TWV 51:S1: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f50ab084d13d16d57f70b16ed99ae927b47f78188381c1c9585ca7ede84db8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331603498 — a six-check JSON result.
Concerto-Pasticcio in D Major: I. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c7eab18f5bf639345126d7268c99e0cacf503141e98333e53db1211a91e7fc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY332103410 — a six-check JSON result.
Sonata à Oboe Solo e Basso Continuo in C Minor: II. Non tanto adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84232a0eeda59ad930db545e173e523e95aff3175321d885bae0bcaffc30ea5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY330902179 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd4300cdca8c1f327a5a476317fdc1b589a7b1c613e565d869cc1d3e40dd06c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404289 — a six-check JSON result.