Marina Piccinini (born 1968) is an Italian-American flautist. She is noted for her performances of both the traditional classical repertoire as well as by modern composers, and has performed with man
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 0xad2d16332e162b5ab547ee8347af6a87ee385a4b0f2c5931a1ccd49f1092a130. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0b1f1ef-c880-4f7a-b5c6-2c2db5d3807e.json and https://artists.proofprofile.net/proofs/artist/b0b1f1ef-c880-4f7a-b5c6-2c2db5d3807e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Tre Voci: Toru Takemitsu / Claude Debussy / Sofia Gubaidulina
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 0x62ea2d1245b6a346359215e2a3d30ff3ebeb7a41eea67f045b91eceb3d25a326. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331334501 — a six-check JSON result.
Sonata For Flute, Viola And Harp, L. 137: 1. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8e67271de0b42bb7ba0bfb7a8687130b2774204e029dad661189049d81b1e9. 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/DEB331334502 — a six-check JSON result.
Sonata For Flute, Viola And Harp, L. 137: 2. Interlude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab91c0794b7e9c601f4be6443beaafd51669124a0610a43d1f2707aac029bd92. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB331334503 — a six-check JSON result.
Sonata For Flute, Viola And Harp, L. 137: 3. Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433a3a20b5684196417236142bba53ff8e86bb7ea65cff6180188d946cd301f0. 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/DEB331334504 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37568ad7b1b2a729750fc293b8a27d0f93108615f1ad1753f17fe0eaae1f008b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEB331334505 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bddfd465e4552bcb25250ad8489e0d315b4d45676d8fbe81ce8cd952fddc5d1. 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/GBELX1003254 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8f7532c6e4a9e1cd3287aadf1cfec1d5363f3495286f1649129ea23240bbb0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBELX1003255 — a six-check JSON result.
Sonata in G Minor, BWV 1020: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d05bba3f456233378dd81b78b191e8c548a3eb342a20adb69586732973df35. 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/GBELX1003256 — a six-check JSON result.
Sonata in E-Flat Major, BWV 1031: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa436d53c44723c5f2052d3ab6195ccf0050c2c416b880f30c609f578c4b5b82. 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/GBELX1003257 — a six-check JSON result.
Sonata in E-Flat Major, BWV 1031: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf249b8915b4b3ed059badf261dd67ea19fcfa64563b7d3d76af2904c991168. 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/GBELX1003258 — a six-check JSON result.
Sonata in E-Flat Major, BWV 1031: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe129c17b3cd5db10f7e2d9d06b614cd7da112628f32d1787b4c4b5259c4974f. 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/GBELX1003259 — a six-check JSON result.
Sonata in E Major, BWV 1035: I. Adagio ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ac2eeada3c1ad4e7374b3dd62c7206167a3ddfacd1ff80bec58e5b7d2c9c27. 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/GBELX1003260 — a six-check JSON result.
Sonata in E Major, BWV 1035: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67f307bd75cd38d688a245864227ca40a3996fb5b321888e31e6ee96df923b. 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/GBELX1003261 — a six-check JSON result.
Sonata in E Major, BWV 1035: III. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c393e4e2c850526e01956d094b88150e287fd5e24b98a2104c5582e06e848. 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/GBELX1003262 — a six-check JSON result.