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 0x872c483602f7e0d1b4e97947c8d1a64d5b9dc671b05d586e6cca57408f5f51b8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61c2abbe-b0ee-49bb-9549-9bee0964f7ea.json and https://artists.proofprofile.net/proofs/artist/61c2abbe-b0ee-49bb-9549-9bee0964f7ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Honegger & Ibert: L'Aiglon (Live In Montreal / 2015)
Chill with Mozart (Enjoy the coolest melodies of Wolfgang Amadeus Mozart)
Second livre de pièces pour clavecin, Ordre Sixième: No. 5 Les barricades mystérieuses
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 0x5df450cedb0579f6be6c0e64911a37f1adb7ff07783398524c1c9481692d91ca. 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/USA370568321.
Andromeda liberata, Serenata veneziana, RV Anh. 117: Sovvente il sole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ada1a068ff7dd4ac61f019a91aaff6d5141eccf6ff6aab0c5cb1610fbc14c6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41601222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22ac25c6c08ad14b55d04504712a5aa64a4a6094fd8b2c41bc995c330216a3. 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/CALC41601221.
Sonata No. 5 in F Minor, BWV 1018: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbf9e58361a83d025f04ca075c96d1ecea579acd082b17d31a1cb222e8c3b85. 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/USA560611278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bcf8a4e28c5759b65b3db8a63cc189666657aa855faeffb67111beb0be06a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA370539282.
Suite No. 2 en mi mineur, RCT 2: VIII. Tambourin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac423028cd1ae86b595d3e9c6c3ffc59d38ddec44177eb8c7b675f3e76439771. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA370568329.
Mi palpita il cor, HWV 132c: IV. Se un di m'adora la mia crudele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535fdef91fd1e1f6a2c7426fa2acb1921c3a42e764877959965403198c3f150. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA370524133.
Armida al campo d’Egitto, RV 699, Sinfonia: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d835f7e8e6eac96b155e5f7a6134e8db51a91f13a0f27c48fcc8615e789b87. 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/CALC41601223.
Mozart: La clemenza di Tito (Live Recording at Théâtre des Champs-Élysées)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d051b3ecf3bdd2af520a2c222369f6bbd6204e283c72fee57da2afe4a19f0e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/CAJ721874101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b4a3ec0b2cf22381e371e324f7ee7acaa7756b4361c24bd5bc4df968542f3b. 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/CAJ721874103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d591fd1c8328466042509083853d367d37c08ba40caf47b0d72a9f50c13b63e. 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/CAJ721874204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94525d089bddd003cecf2b844453e392db7140829ae71be688318a51bd547881. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAJ721874206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b69dc1492b12581e289d40e76a9a6376a06cf50ca741210f40cce7bc651416. 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/CAJ721874108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf509e6630b784a15b9fba54b5c46995e8a2aa1bb6614870e53b53aff98e5b9c. 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/CAJ721874110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb6167f81458b852e6ce624d8be76b7728440696b25cd4a34f1ecc7d421077c. 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/CAJ721874120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7633b533986886a9ece480168a5f0c8fa46c5baf493994bcd017a87813893bc. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CAJ721874121.
Deux duos pour deux sopranos : I. Puisqu’ici-bas, Op. 10 No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462df6fb192aabc35fb2efa9b3f1653db80643682ae3a54d1cb173b7414dec4b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAJ721874123.
Poulenc: Intégrale des melodies pour voix et piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1239488b9cfb578644550baf03a9f711ad24fc921aad59df71a306603984e0a2. 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/CAJ721388214.
Fauré: Une sélection de mélodies pour voix et piano
Fauré: Requiem in D Minor, Op. 48 Duruflé: Requiem, Op. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ada1a068ff7dd4ac61f019a91aaff6d5141eccf6ff6aab0c5cb1610fbc14c6. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CALC41601222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d835f7e8e6eac96b155e5f7a6134e8db51a91f13a0f27c48fcc8615e789b87. 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/CALC41601223.
Rinaldo, HWV 7, Act II Scene IV: Lascia ch’io pianga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae8c6e8f0585d8e84055d32b11459306a5ecbda61048a57bdaae1edbd88515d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CALC41601227.
La fida ninfa, RV 714, Act III Scene X: Dite oimè! Ditelo, al fine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b51060c78a1dbb2551a79fbc4e79fbb91972bd75fec8182a028abce7a080ea. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CALC41601232.
Serse, HWV 40, Act II, Scene IV: No. 27, Se bramate d’amar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad566d8d8ed5c18740ddbf1c907ebd5abec50750a5972900aed9b3dcb262a018. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CALC41400002.
Jules Massenet - Intégrale des mélodies pour voix et piano
Ravel, M: Enfant Et Les Sortileges (L') [Opera] / Sheherazade