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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc536c744ab6ec3ab4ecdfc60611cfbc34da1a753b841adfd5d67ee0c65d496. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4dc5aa55-cbe2-489a-b88e-ef1f325518e4.json and https://artists.proofprofile.net/proofs/artist/4dc5aa55-cbe2-489a-b88e-ef1f325518e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charpentier: Leçons de ténèbres, Litanies & Magnificat
Arias for Benucci: Music Written for Francesco Benucci, Mozart's First Figaro
Una cosa rara: Aria. In quegli anni (Tita)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7077c8a3d4f38b238515e934e504cd0f73eb19282615869b2c1e1e4201acb3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1507806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499cc58c1b30525c37e1478cdabdd526d0f746887de6d12ec487c56532a002b2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM12303910.
Cello Concerto in A Minor, H. 432: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae57f8b2171804789759b67023d405b3cb1568539c1e7f704d05d8bb2b9a5464. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611203.
Cello Concerto in A Major, H. 439: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8222dda0402bae75a4a987a5570e6e0e73f7250d15b25e3782341615a3d575. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611207.
Cello Concerto in A Major, H. 439: II. Largo con sordini, mesto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5c657852590557371a6b9ccd93fc9adac6d7d15a62a54b9e3ed166b887afb1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611208.
Cello Concerto in A Minor, H. 432: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4757fa37367237bac1707f1fa531739013cf91a95613d3676e97302efc628585. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611201.
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
Cello Concerto in B-Flat Major, H. 436 : I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0775a6d76cca1940306c47b7505e9c29a3a2cb068a78c86123c7c88f7642dcae. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611204.
Cello Concerto in B-Flat Major, H. 436 : II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70b00db74c08c623bce630940bd549ad8bc0518250cb959260ccd07a08dcb1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611205.
Cello Concerto in A Major, H. 439: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fc59cf1a342167c95ccd8834727c82f2f9c30eb91037ce261f00bf21f6e31a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1611209.
Piano Concerto No. 23 in A Major, K. 488: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ef92e4df5a1e3d5da44eb3022417a81c3b8d72e9e28e6e0bd4a42f39df78c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309024.
Piano Concerto No. 23 in A Major, K. 488: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a193e43479ce9be345aff007b8ae3a0b55825d64ea709070717e847dcbe1ef. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309025.
Piano Concerto No. 20 in D Minor, K. 466: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182a7b854941fac2f9fe30f33029eb3f4caf66ac470b1c56f25a7533b7aa9215. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309021.
Piano Concerto No. 20 in D Minor, K. 466: II. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cdea18dfb968270ff119ccc900e842b2d3e2c9bdf97e912e441d5c4646aaaf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309022.
Piano Concerto No. 23 in A Major, K. 488: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead30a0aea4c461eae195d7f9925914b06ca4bd46022b4fcb8d8c0361bb47d23. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC42309026.
Monteverdi: Madrigals of Love & Loss (from Books 6-8)
La morte di Nerone: II. Aria. "Quella morte, che per gioco"
La Fida Ninfa, RV 714 / Act 1 Scene 9: Alma oppressa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab7c34bba45ff2cca509b8406a555b806d8cae79f1a39ea570c2e8a2d431824. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203820.
Giove in Argo, HWV A14 / Act 3: Combattuta de due venti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9748cb1666bbb03510341b08315ff45db3b13982fcd93b26eaa501bc43ec71ef. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203830.
Raise The Voice, Z 334 / Movement 4: Mark How Readily Each Pliant String
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73538c7f90c6bc8ee0b7d6311bc27d2704c85ba912ea573d227a055aefcca717. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203850.
Apollo e Dafne, HWV 122: Felicissima quest'alma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ffb61cbc6550b016cef38389ebadee721132db17f13f311bbaae238506062c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203860.
Timon of Athens Z 632 / The Masque: Curtain Tune on a Ground
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48974d0bcdb04c35bed73cd154ecd76200c3082e3aa3872b035897db745b07b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203880.
Alcina, HWV 34 / Act 1: Tornami a vagheggiar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cff78200b395862014e3933d5072c87a1ad5ee42443d70241f3691e09465ba. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203900.
The Fairy Queen Z 629 / Act 2: No. 14 "See, even Night herself is here"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e5c5ce69e3b53decc643d738173384a0f97d8ddf569da49affdd377bf3512. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203930.
Eighth Book Of Madrigals: Lamento della Ninfa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cfd74d8c2671fda128d26afe793bd2916416c377ade8072c599c5a72e0c054. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203960.
The Fairy Queen Z 629: Hornpipe In D Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eae696a60d9d039a890b1ed0a442e09d58bee113b111d746794e5cf1d3965e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1982ba16e497bdf6b86b3c9b6037a7f93b9f7b3f804ca1a009a631497cc32bf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203890.
The Fairy Queen Z 629 / Act 5 / Epithalamium - Thrice happy Lovers: O Let Me Forever Weep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50a863824857a4907f248f7dbcd155ad025097ddad388f427d4bd6a8badc1a8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203920.
Trio Sonata in C Major, RV 82: II. Larghetto (Arr. for Guitar by Michael Lewin & James Halliday )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbda44b892f1d3d01e2e4284d14e08e699df33ca302bd6e91e72e0e009a0470. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM12303908.
Canon and Gigue in D Major, P 37: I. Canon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ce1a83cd6b775db8df0ba87b6e21a77c8a8725334f9d4ea63677b4cc741b04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960901061.
The Fairy Queen Z 629: Hornpipe In G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c9b67e3dea0a06528217feff9bffe2b05a18dcc1fc8aae720930e5ed686884. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961203840.