{"copyright_id":"0xaf9518686cb7e0eb5bdd65342b08d942db4691a7ed4bdd56c920ed5b79f3a603","name":"Gruppo Instrumentale di Roma","registered_at":"2026-06-14T08:16:28Z","symbol":"NIM0392918","token_address":"0x33c5a2df04b2e59ee6ca5e1dcb419de9bddffccb","type":"artist","uuid":"25145abd-8d11-451e-bdfd-7f2da9244021"}
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 0xaf9518686cb7e0eb5bdd65342b08d942db4691a7ed4bdd56c920ed5b79f3a603. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25145abd-8d11-451e-bdfd-7f2da9244021.json and https://artists.proofprofile.net/proofs/artist/25145abd-8d11-451e-bdfd-7f2da9244021.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Concerto in D Minor for Oboe, Strings and Continuo: I. Andante e spiccato
A. Marcello: 6 Concertos "La Cetra" - Concerto in D Minor for Oboe and Strings
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 0x6b0d99d6c62e94641c3d1015acb5a5d5b147b6ec914da3455ecf47a5486b82f2. 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/NLY331404911 — a six-check JSON result.
Concerto in D Minor for Oboe, Strings and Continuo: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d00b729b45a4817f90373f1e5095419e52f18f99cdea3d20f8ed7e59e07e45f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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 in D Minor for Oboe, Strings and Continuo: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b01572660361bc9d2ffce57e22c726ded43a8a17e6eb7e30bf7e35ef9ce589f. 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/NLY331404913 — a six-check JSON result.
Concerto No. 1 in D Major, SF 936 "La Cetra": I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c506ad1087e524695136802042ec9699b42d4901f5c2c08ef5534a070377fb. 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/NLY331404914 — a six-check JSON result.
Concerto No. 1 in D Major, SF 936 "La Cetra": II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01013b46c6bc3a1db0f21482a19cec44725de77e16ea458c3c76cd188da785. 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/NLY331404915 — a six-check JSON result.
Concerto No. 1 in D Major, SF 936 "La Cetra": III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4072d61aaf356c412fd092788d46518da093b056ec5eec218c390fa6a6872f0b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331404916 — a six-check JSON result.
Concerto No. 2 in E Major, SF 938 "La Cetra": I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2984aa6e529344c8d1c3feaa95290d6eaacb372d8da2be824cd6b32dc464ace. 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/NLY331404917 — a six-check JSON result.
Concerto No. 2 in E Major, SF 938 "La Cetra": II. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31430231477b7c4c33f7a34a46d7a25d91c691920c86a659d704b0d96359d39. 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/NLY331404918 — a six-check JSON result.
Concerto No. 2 in E Major, SF 938 "La Cetra": III. Spiritoso ma non presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc808b8bd305047264625ad350a88646d8957be28b2266824cb7e85e2c8d49a09. 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/NLY331404919 — a six-check JSON result.
Concerto No. 3 in B Minor, SF 937 "La Cetra": I. Andante larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0827b2ecb2384aaf6b77f396fa05e2103b9e1a9139406e8cd9c72c3ecb1117. 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/NLY331404920 — a six-check JSON result.
Concerto No. 3 in B Minor, SF 937 "La Cetra": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8214415c3b5827b9553ec3334389892f7bb2e6ecddb4db3d4aedc57333179e24. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLY331404921 — a six-check JSON result.
Concerto No. 3 in B Minor, SF 937 "La Cetra": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad969b6721fb4641823f2e5f418759d4d06b541fe970b35f918d1f2111c8b53. 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/NLY331404922 — a six-check JSON result.
Concerto No. 4 in E Minor, SF 939 "La Cetra": I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806a9f647a7c6d2c1552292dc617eb4838b33b675839b72cce5eba17506a70b0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLY331404923 — a six-check JSON result.
Concerto No. 4 in E Minor, SF 939 "La Cetra": II. Largo appoggiato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8903047163f3519945b2bffa08f0f54d9165c5f99218a3f1726216e790d776d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/NLY331404924 — a six-check JSON result.
Concerto No. 4 in E Minor, SF 939 "La Cetra": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf29e25fffa3d4e08928572e8a1f2811b83ef8991f397437aea2072db58c46a4. 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/NLY331404925 — a six-check JSON result.
Concerto No. 5 in B-Flat Major, SF 944 "La Cetra": I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77ffa9c87f110778ca73c72423a98a1239cfacb2c68f45f8ccd8e15b0f18926. 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/NLY331404926 — a six-check JSON result.
Concerto No. 5 in B-Flat Major, SF 944 "La Cetra": II. Larghetto staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632986927cd0731a1cda19222b0d6ddec97e55f9d3878388c1774697f0d9987. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/NLY331404927 — a six-check JSON result.
Concerto No. 5 in B-Flat Major, SF 944 "La Cetra": III. Presto ma non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c7570042d09fa8817c0ab523c643d18dec10ee89932f45665cf172c374344c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLY331404928 — a six-check JSON result.
Concerto No. 6 in G Major, SF 941 "La Cetra": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5c61f248610ec83bfd486585f52b3b79c387b2317432dc77c05a919f7e160b. 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/NLY331404929 — a six-check JSON result.
Concerto No. 6 in G Major, SF 941 "La Cetra": II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3b397c2ca21257bb9e852ae274cbb8a1d33377edad0fe45b524204e17ecd92. 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/NLY331404930 — a six-check JSON result.