thumb|Andrea Marcon Andrea Marcon (born 6 February 1963 in Treviso, Italy)Deutsche Grammophon, Biography: Andrea Marcon , October 2007 is an Italian conductor, organist, harpsichordist, and scholar.
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 0x37fce9316ce7fb0db94d04c16abded7fac36d53cd984e606ab83ddb8781e326b. 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/1de44de2-c8a0-4998-88ac-8831cba179c8.json and https://artists.proofprofile.net/proofs/artist/1de44de2-c8a0-4998-88ac-8831cba179c8.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Claudio Monteverdi: Vespro di Natale / Christmas Vespers
Vespro della Beata Vergine, SV 206: Deus in adiutorium - Domine ad adiuvandum
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 0x97cce66b29075039641ac4cae99e2d07956a445f505acd9decd4503d6f376d1f. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEN962232701 — a six-check JSON result.
Selva morale e spirituale: Psalm 109: Dixit Dominus II, SV 264
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571c09c187d5da3d5dff9e256d671926f37d4fd4b4632854b85dc34790ebc803. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEN962232703 — a six-check JSON result.
Motetti a due voci: O felix, o lucidissima nox
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d36b64d236a9661084238770361e35f9092b9061dfd4cf331553f625f097c1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962232704 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e50637213b0685d0d2c5e747c8489538d14d67537d467bb1fbf2331a5fbaca. 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/DEN962232705 — a six-check JSON result.
Selva morale e spirituale: Psalm 110: Confitebor tibi, Domine III (alla francese), SV 267
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616a6c89af4e9232d834630dfeb7d41f6a88d9bb1414b55fa4d897d8058e15b0. 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/DEN962232706 — a six-check JSON result.
Compositioni armoniche, Op. 3: Sonata a 8 con quattro soprani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd988b6805276a51808198227cb8948701ec3564778c2c375665c79d3869d2d76. 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/DEN962232707 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f8be6c2f0d1dc217400133973bb28773ca35868fecad8712b2b17da5ec438. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEN962232708 — a six-check JSON result.
Selva morale e spirituale: Psalm 111: Beatus vir I, SV 268
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0d8395aab4ce491e15cc54573eae0b7df5ee01dd4c2bfdb8a0a04c4308a507. 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/DEN962232709 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482ad8ffab040bf86f1dbd32f8779ff2d1fe4cb6a2ed4ca2d6546da32fd790a6. 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/DEN962232710 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd2e9815d626c578190d8b0570c4c244535d271e17c85cd8a4119fd289fd9c2. 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/DEN962232711 — a six-check JSON result.
Selva morale e spirituale: Psalm 112: Laudate pueri II, SV 271
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240153ae94a7d8b4b56b7da5054b064b995ddc474c9c30e46739d4f146710b31. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEN962232712 — a six-check JSON result.
Venite, sitientes, ad aquas Domini, SV 335
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe6fcccbe52e9e7175e6f479dd1149ef20f00d59c96a8e78fde9b8ddcd5f431. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN962232713 — a six-check JSON result.
Selva morale e spirituale: Psalm 116: Laudate Dominum I, SV 270
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6409e3c0521fc34ee81823c2a61c064b97bbb0e0ba4d521864d844ca00bb4a1e. 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/DEN962232715 — a six-check JSON result.
Selva morale e spirituale, SV 280: Hymnus: Christe redemptor omnium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422a1480dea3a818b3421d51cc53cd46e2d5625e6a4fd6028bbd37504cf134ef. 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/DEN962232717 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceda6a8046eb19122b64ccf0e741f2155a48d2ba5e0a95fb44d279c61b27e54. 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/DEN960632001 — a six-check JSON result.
La Fede Tradita E Vendicata, RV 712 - Adapted by Andrea Marcon: Sin nel placido soggiorno
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe912a601961a22986a0b813cae5b20b37747425eb2a8272a5c40e5aed8dfc59. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEN960632002 — a six-check JSON result.
Vivaldi: Orlando Furioso RV 728 - Adapted by Andrea Marcon / Act II: Ah fuggi rapido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57ef63219ac6467adaa38e8b91da6f26cdede35612f1fae4afdeb2406bec89. 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/DEN960601410 — a six-check JSON result.
Il Bajazet (Il Tamerlano), RV 703 / Sinfonia: I. [Without Tempo Indication]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d7e203f30381bc24bbae8364b41bc5b9cdc63afda675f08226753f74906fc. 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/DEN960601631 — a six-check JSON result.
Il Bajazet (Il Tamerlano), RV 703 / Sinfonia: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa508ea604c16d0d07c91e203de4c31e0f67503a4dfaf6bbb47f63462b4bcec5. 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/DEN960601633 — a six-check JSON result.
Tito Manlio, RV 738 - Adapted by Andrea Marcon / Act III: Dopo sì rei disastri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04de2f48640cd7d1164941020151b9c61828ecc5d6397585a79c500496e514. 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/DEN960632008 — a six-check JSON result.
La Verità In Cimento, RV 739 - Adapted by Andrea Marcon / Act I: Amato ben tu sei la mia speranza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82202d2f4844869e7612236a502e8d64dd408e6eac2bebbfb79155de7d93075b. 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/DEN960632009 — a six-check JSON result.
Tito Manlio, RV 738 - Adapted by Andrea Marcon / Act II: Combatta un gentil cor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a38c4b04ed7e2cfdb7dbb58560f264eaf05870061409de0b81e97473a01fa51. 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/DEN960632010 — a six-check JSON result.
Scherzi musicali, cioè arie, et madrigali in stil recitativo: Zefiro torna, SV 251
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b4f920dccdcbf2c1c40851579e605e2dd3713a982a6e1dd807e98a7e50cb5. 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/DEN961404040 — a six-check JSON result.
Porpora: Arianna e Teseo: "Mira in cielo" (Alceste)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e63425b63bb2289a45218687cc1b23f74caa04f89c8d5ef72c07f2e11da854. 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/GBAYC1302153 — a six-check JSON result.
L'incoronazione di Poppea, SV 308 / Act 3: Pur ti miro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce53e0df321f8098787e62b071cbaf3a0e42c09d46d68a78c89c957ed44acdf. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEN961404150 — a six-check JSON result.
Madrigali guerrieri, et amorosi: Lamento della ninfa, SV 163
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e6b003dea9e8746210e653f8ce2f48d2a04d67b817ff8535a83758f66a94b. 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/DEN961404050 — a six-check JSON result.
Porpora: Semiramide riconosciuta, Act 2: "Se pietoso il tuo labbro" (Mirteo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af9f05486ed5d233b4f663cba08d3dda16f4e63e2106fd9e56636899b88c527. 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/GBAYC1302145 — a six-check JSON result.
Scherzi musicali: Damigella tutta bella, SV 235
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c48a742637578a7a205303de8d5349bf141729857e176e9fe4919a1ba0eec. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961404120 — a six-check JSON result.
Porpora: Polifemo, Act 2: "Placidetti zeffiretti" (Galatea, Polifemo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f14c786232209e707966b850cddbbfbc4c59a8fd0bee05a1b7ccf7287ef378e. 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/GBAYC1302148 — a six-check JSON result.
Scherzi musicali, cioè arie, et madrigali in stil recitativo: Quel sguardo sdegnosetto, SV 247
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa689fa0828d0b744c43b1d087f81a493d4cb6650c048d3db0465a28130c026ad. 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/DEN961404060 — a six-check JSON result.
Giulio Cesare in Egitto HWV 17 / Atto primo: Care speme, questo core tu cominci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343dca0f2961c2e34fb96fc0d21f3bb6d5475e9fd4f1ad902a76e29e91ed3344. 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/DEN960631604 — a six-check JSON result.