thumb|Portrait of Marianna Martines by Anton von Maron, dated by Lorenz ca. 1773 Marianna Martines, also Marianne von Martinez (4 May 1744 – 13 December 1812), was a composer, pianist, and singer of
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 0xf8882fa60b160ecc0096281078922daed036f99951e7bc39426a71a13824791b. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a65ccd3-c4aa-4ed4-9387-ae3f17e699c9.json and https://artists.proofprofile.net/proofs/artist/1a65ccd3-c4aa-4ed4-9387-ae3f17e699c9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Martines: Symphony in C Major, Psalms 110 & 151
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 0xea4387f0ea42d7f8a1312e919a821822c416393c8baf2e8bf542bff8adb736d9. 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/DEB202098501 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a876d0783c20796d3d617ced4e3d27aa5699b893302bb407790b0068c415e79. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEB202098502 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ca9c505223cf882c6b0b61d797d040fb7e35bafd1052381fecc8d9ed8aabd4. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DEB202098503 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe59d0106c905240a1ad6e998f683adf6de5a257c66e0c47a3bc27071aed8f4b. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/DEB202098504 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab39543ff074aab5d5e126e71d9e9f167d260d6dddcab8a603383ade5cdf91b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202098505 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e9f4b398bef487b89a21b0d90afb6836c4b9dccf7e0d9a846a7a7dfe4f5d88. 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/DEB202098506 — a six-check JSON result.
Symphony in C Major: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ff16178a5c95dc6cab744931aeb71acfc59b1a9a8300d119dd6a1adf3e62e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202098507 — a six-check JSON result.
Symphony in C Major: II. Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432b35f59ce383517630ce5c37caa077017e33668847b24014b48021e6c236f. 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/DEB202098508 — a six-check JSON result.
Symphony in C Major: III. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2f4e522fae1f6d38442bd673e4865dc041f24037c6d5a60f07f0324242238c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEB202098509 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a5d5c22e2dabc724460349ce16a064893da95c0c3414e8e398610c79a409e1. 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/DEB202098510 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e52fac277ed9c23535912116ed35caf53efc074ff3f7a0670f9b42d245698f. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEB202098511 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb0aaf68371da932e9a8dce27a3e454e8248236cd6199e182eb2efa3cfa7e7b. 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/DEB202098512 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde12db5aafe9a869dde0c8daa72983c5d6f08b30c629ded9777109d2c52dd550. 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/DEB202098514 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679102a190093083ffd6867b872b6cded72e2648808552cccb8a2469d108d444. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEB202098517 — a six-check JSON result.
Concerto per Cembalo in G Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a69d1c1f38db85787bcf7a38154879faf6f74b111b7fb1741229e65fd9942. 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/DEE471400354 — a six-check JSON result.
Ouverture in C Major: I. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6643c997bc5bc1e49a353f5bb50bfbbda7aece83525edc24fa251edbde662a64. 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/DEE471100305 — a six-check JSON result.
Ouverture in C Major: II. Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8348fde394154e9188a0a2a70df00eb28bf7238cb8aa98eb44ea2064021ba. 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/DEE471100306 — a six-check JSON result.
Ouverture in C Major: III. Allegro spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1584881d04c0fa1a5e8addee28b266e4d0b5e5aa38c72e05f1e5404bdb6007. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEE471100307 — a six-check JSON result.
Il primo amore - Cantata: I. Ah troppo è ver! (Rec)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43ac65c025dd9afd61aecd4e2c34a2cfbff5c20dce3e1b966a1d86f8bbfd060. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEE471100309 — a six-check JSON result.
Il primo amore - Cantata: II. Sol che un istante (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8e98d180b8fa594bdd8ef1fb22088ec5d2f50d434362f659682603581a8b6d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471100310 — a six-check JSON result.
Il primo amore - Cantata: III. Nè sol, quando la miro (Rec)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfbf6f32e1dac74288c0700da9b361be8fb01c4cf0f27f6d60e9cbdd98636de. 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/DEE471100311 — a six-check JSON result.
Il primo amore - Cantata: IV. Bella fiamma del mio core (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99c8cb3be64d81cbdeb0e49381d430d349ad3bace0da35347c557476576ef3e. 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/DEE471100312 — a six-check JSON result.
Concerto per Cembalo in E Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415747faecad9a2aa060ea3c3e32e95ef52a1fb15146593169a59a05a30f111e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEE471100314 — a six-check JSON result.
Concerto per Cembalo in E Major: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bfd583d1aa57ae66fc3dd703309969d9604498ec04114eb37814f29671602f. 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/DEE471100315 — a six-check JSON result.
Sonata per Cembalo in A Major: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7553e9140fa2f39f65e7eae0eb3a3dfbedfab8e5f30447f5e4e2d0d619c0d268. 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/DEE471100318 — a six-check JSON result.
Sonata per Cembalo in A Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eaa965f401004abf3a0f7f83bf4fce8731a806fd02e58e70f97c3fe09bae41. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471100319 — a six-check JSON result.
Sonata per Cembalo in A Major: III. Tempo di Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f51c40f0f30dcd4274a3f63205258adf6ecda9184ef7a175edfb4e0a9c1196. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEE471100320 — a six-check JSON result.
Berenice, ah che fai: I. Berenice, ah che fai (Rec)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d26ac03c14f7a65a70a09cec61f9f4633ce28ce0f9c94ba78f42c0532809d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE471100322 — a six-check JSON result.
Berenice, ah che fai: II. Non partir, bell'idol mio (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcda7e7c68111ee58ae4b2f72d8429b9651627d5e708c076db0295aa3d27955. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEE471100323 — a six-check JSON result.
Berenice, ah che fai: III. Me infelice! (Rec)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45357b43b06c5d518251a4a6dd8dfb28595a3b608eb440dd59487b37ed87cd37. 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/DEE471100324 — a six-check JSON result.
Berenice, ah che fai: IV. Perché, se tanti siete (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ff45e0631ab2b0e14b06c4c5ea96094e70405d90834c95c0e360bd786bea26. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/DEE471100325 — a six-check JSON result.
Piano Concerto in A Major: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ec03eb51cd32dadb9f4da69491cf4492b962b14f8c589b92eb720e20f0ee07. 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/DEAD62001606 — a six-check JSON result.
Women Composers & the men in their lives
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0e89164786c22769b95180cb8752b4e34853182d3fdafbc3465808d4db0620. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USXA21000795 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c36c7f80170f11ef38b81e5ad04f2803a56211ed14f0074cfbc89acbc723be. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USXA21000796 — a six-check JSON result.
Keyboard Sonata in A Major: III. Tempo di Munuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7995148e627afa9cfc1b3a78d692239a8e7f9ff8bf2d2bf20dd26104e1c75e. 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/USXA21000797 — a six-check JSON result.
Sonata in E-Flat Major, IMA 1: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b142e3f9602330708d77c705c063c8bbcd29f0b6694c10d778a539b2909012. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CACGH1917263 — a six-check JSON result.
Brigitte Klassik zum Genießen: Nuria Rial