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 0x7b1ca832c4af779824ca83bf12e6d98c6a40ed5e1ba6da12f65282049c310a9a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1bfe993-be97-4de8-b9b3-eb80fb1792a6.json and https://artists.proofprofile.net/proofs/artist/d1bfe993-be97-4de8-b9b3-eb80fb1792a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Early Romantic Concertos for Clarinet & Trumpet
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 0x93d0a85b209bb6d3173083d87ac1b68d94d4fd1c01b431544d584f2a57405ff7. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQFY1106506.
Mozart & Brahms: Quintets for Clarinet and Strings
Copland, Francaix, Nielsen : Concertos pour clarinette et orchestre (Great clarinet concertos)
Concerto pour clarinette et orchestre a cordes avec harpe et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cde5e7bc8e7885e44fdb87e43eb7feb09026016723cc0620d4ae7be824c670. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1200540.
Concerto pour clarinette et orchestre: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5dabc0fde303ff986a00d093a647a3b8dbad02fa2fed25af0e95bfb1791b85. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1200541.
Concerto pour clarinette et orchestre: II. Scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd58f74d849bbd9694964013ad073b7ecb08402bcc550fa464a032290b5328b5. 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/FR3KD1200543.
Concerto pour clarinette et orchestre: III. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001829729f5123db0f92722da00b467b36398371b2a5fdf706bc836ffdba6797. 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/FR3KD1200544.
Concerto pour clarinette et orchestre: IV. Allegrissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4a4099beca638706f9333f6ea435708a832a2bbfba53ce3ad4d6adeb8d5ede. 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/FR3KD1200542.
Concerto pour clarinette et orchestre, Op. 57
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6029ccaec70f6322d2b66275262cc6a71f82ca6d30e8e1d425032daaab40ce. 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/FR3KD1200545.
Weber : Intégrale des concertos pour clarinette et orchestre (Weber: Concertos for Clarinet and Orchestra)
Musique russe autour de la clarinette (Russian Music for Clarinet)
Jean Francaix : le Gai Paris - Concerto pour clarinette et orchestre - Divertimentos (Chamber Music With Winds)
Classical Music to bring on a desert island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095540d298066631c446fdb40a5f1866803f3461d569ff181aa3d0fe7140e638. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078811573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913bc0798d13cc34442b65a195dff2c0028da56dc5ac331a815e55f04403cd04. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR6V80076925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12e7b084446e127fe371ab2c5aca791f65654d0377466652bd2ccb7e2176986. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR6V80076931.
Orchestre À Cordes De La Garde Républicaine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6870cb038d063c2d25ef676bfc25ec50d6895f15a9be0a9e38b7a4490aacec72. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c3895a6741f7755cf536812394dbd23fd29bdb810b7ab6c4ca9fa7175ea49. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba9fdb46eabea511e3f0738b3dfcf29a8147c0eb8dfdbccdb572aa84398d759. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR3KD1507128.
Clarinet Sonata: II. Andantino - Vivace a leggerio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3fcad7fc186e69b58e2ea5fa8bb10079e66e0d06f04d4bb24f33f3deec808f. 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/FR3KD1507129.
Jean-Baptiste Robin: Fantaisie Mécanique Music with Organ
Bréval & Devienne: Symphonies Concertantes
Vesperae solennes de confessore in C Major, K. 339: No. 5, Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749c49eeaab3d7bfa5c5622c1d820afb3650dd73537c8a75b447c2f10910e0c8. 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/FR2X41726063.
Les nuits d'été, Op. 7, H. 83: No. 2, Le spectre de la rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d98a3bf56be7dcc96bd5b6ff4cdfdcec979c86e9cd4511e9f4bbdf74542f9f. 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/FR2X41726067.
Le nozze di Figaro, K. 492: Air de barberine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe91a09b22a2290950d14fc1a487a24dddaaa331178e85e6604ed58f66ceba53. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR2X41726076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c48f6873a51dfe8766a721c89396c49d9c9f0a30ac67e72625cba2f1a573003. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1301194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50eb711456c10011ddb00d71e0032b018d5adf8c18c08358152ae886e9163b3. 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/FR3KD0901418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f700efe77ae04a3caf18bba3f706cf9e8ccfca57569f63893db0379b1a259. 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/FR6V81003781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c3895a6741f7755cf536812394dbd23fd29bdb810b7ab6c4ca9fa7175ea49. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR3KD1507123.
Kol Nidre - 8 visions (Jewish Classical Music)