1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x559621808cdcc00b6c395f660b40e08ad1d5d8da413e4a008dca80e5f39b3af1. 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/3e81b175-4b35-4eb2-ac0d-8d599c0cef6a.json and https://artists.proofprofile.net/proofs/artist/3e81b175-4b35-4eb2-ac0d-8d599c0cef6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xef48f9b466a5e3f40d881f9a08f9382a7e1bd6399d72ce9e1fd1a03dd402d249","isrc":"FR9W11209490","name":"Une petite cantate","registered_at":"2026-06-18T05:32:58Z","spotify_id":"1gUTVlfdDrBB61nQ3sDWOR","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef48f9b466a5e3f40d881f9a08f9382a7e1bd6399d72ce9e1fd1a03dd402d249. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1gUTVlfdDrBB61nQ3sDWOR.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1gUTVlfdDrBB61nQ3sDWOR.
Barbara / Arr Tharaud: Pierre (Prelude) [Arr. Tharaud for Piano]
{"copyright_id":"0xe6cfb75afd3f388be8138d67c82f7b529c1c0061965e87f6370c264da6d16d31","isrc":"GBAYC1702427","name":"Barbara / Arr Tharaud: Pierre (Prelude) [Arr. Tharaud for Piano]","registered_at":"2026-06-18T14:59:30Z","spotify_id":"3WgkrixcMZBDmPnOHHhInv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cfb75afd3f388be8138d67c82f7b529c1c0061965e87f6370c264da6d16d31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3WgkrixcMZBDmPnOHHhInv.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3WgkrixcMZBDmPnOHHhInv.
Barbara / Arr Tharaud: Ô mes théâtres (Arr. Tharaud for Narrator)
Barbara / Arr Tharaud: Cet Enfant-là (Arr. Tharaud for Piano & String Quartet)
{"copyright_id":"0x9f819bae58e456d71b52059b8a1541c84ea287c00c19709cd2ce0ef13d57a325","isrc":"GBAYC1702428","name":"Barbara / Arr Tharaud: Cet Enfant-là (Arr. Tharaud for Piano & String Quartet)","registered_at":"2026-06-24T11:29:20Z","spotify_id":"1CFTWeniiEQnSDbZkir0QO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f819bae58e456d71b52059b8a1541c84ea287c00c19709cd2ce0ef13d57a325. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1CFTWeniiEQnSDbZkir0QO.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1CFTWeniiEQnSDbZkir0QO.
Rauber & Brel / Arr Tharaud: Valse de Frantz (Arr. Tharaud for Piano)
{"copyright_id":"0x26b97fcd73deb63cbaef7efceb4b4c6e077c2382e19a9d14ee033121d3aa697b","isrc":"GBAYC1702477","name":"Rauber & Brel / Arr Tharaud: Valse de Frantz (Arr. Tharaud for Piano)","registered_at":"2026-06-26T21:37:29Z","spotify_id":"1jpN8ZXhsRiudiwXhLEhWS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b97fcd73deb63cbaef7efceb4b4c6e077c2382e19a9d14ee033121d3aa697b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1jpN8ZXhsRiudiwXhLEhWS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1jpN8ZXhsRiudiwXhLEhWS.
Barbara / Arr Tharaud: Septembre (Arr. Tharaud for Piano)
{"copyright_id":"0x4a9a67c18944dd3ca87e949a7ba9993b3554f031735d89dbe3e3efc18ae20c08","isrc":"GBAYC1702461","name":"Barbara / Arr Tharaud: Septembre (Arr. Tharaud for Piano)","registered_at":"2026-06-07T19:28:12Z","spotify_id":"0FXhG2zNlRwPiBtEfQF1SG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a67c18944dd3ca87e949a7ba9993b3554f031735d89dbe3e3efc18ae20c08. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0FXhG2zNlRwPiBtEfQF1SG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0FXhG2zNlRwPiBtEfQF1SG.
Barbara / Arr Romanelli & Portal: Nantes (Arr. Romanelli & Portal for Clarinet & Accordion)
Barbara / Arr Tharaud: Mes hommes (Arr. Tharaud for Piano, Double Bass & Accordion)
{"copyright_id":"0xe6f5a31769a1b3e24c69d6b60f658b9cdd0e5ae534256044ed72766f5ebb8308","isrc":"GBAYC1702462","name":"Barbara / Arr Tharaud: Mes hommes (Arr. Tharaud for Piano, Double Bass & Accordion)","registered_at":"2026-06-25T01:33:28Z","spotify_id":"2YzZsl2Ox4CgFgBjmOp9uu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f5a31769a1b3e24c69d6b60f658b9cdd0e5ae534256044ed72766f5ebb8308. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2YzZsl2Ox4CgFgBjmOp9uu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2YzZsl2Ox4CgFgBjmOp9uu.
Gnansia / Arr Tharaud: Ce Matin-là (Arr. Tharaud for Clarinet, String Quartet & Piano)
{"copyright_id":"0x9871953f91eb5f823ebacdbd0c2d1a7a1f345dd1bc9e54a97caeb8172957449c","isrc":"GBAYC1702478","name":"Gnansia / Arr Tharaud: Ce Matin-là (Arr. Tharaud for Clarinet, String Quartet & Piano)","registered_at":"2026-06-23T06:32:57Z","spotify_id":"0uoaCNmKBAiFuMBzDzvrBm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9871953f91eb5f823ebacdbd0c2d1a7a1f345dd1bc9e54a97caeb8172957449c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0uoaCNmKBAiFuMBzDzvrBm.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0uoaCNmKBAiFuMBzDzvrBm.
Barbara / Arr Tharaud: Du bout des lèvres (Arr. Tharaud for Piano & Keyboards)
{"copyright_id":"0x48317b7381b920cbceb9113ca272aa5ff2d4aeb82c6d4917bd1c6b96d388b445","isrc":"GBAYC1702463","name":"Barbara / Arr Tharaud: Du bout des lèvres (Arr. Tharaud for Piano & Keyboards)","registered_at":"2026-06-08T11:33:59Z","spotify_id":"1CV7ik77IcDYHADcByXWHk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48317b7381b920cbceb9113ca272aa5ff2d4aeb82c6d4917bd1c6b96d388b445. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1CV7ik77IcDYHADcByXWHk.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1CV7ik77IcDYHADcByXWHk.
Barbara / Arr Tharaud: Le Bel âge (Arr. Tharaud for Accordion & Piano)
Barbara / Arr Tharaud: Vivant poème (Arr. Tharaud for Piano)
Colombier / Arr Tharaud: Plus rien (Arr. Tharaud for Piano)
Barbara / Arr Tharaud: Pierre (Arr. Tharaud for Piano, Keyboards, Accordion & Cello)
{"copyright_id":"0x35f81c7132ec54549eb3d92b7a1412a030801775d0e3a43a45356649204c3516","isrc":"GBAYC1702466","name":"Barbara / Arr Tharaud: Pierre (Arr. Tharaud for Piano, Keyboards, Accordion & Cello)","registered_at":"2026-06-20T04:54:02Z","spotify_id":"34YD8PhlVYa858mhLvSsZQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f81c7132ec54549eb3d92b7a1412a030801775d0e3a43a45356649204c3516. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/34YD8PhlVYa858mhLvSsZQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/34YD8PhlVYa858mhLvSsZQ.
Barbara / Arr Romanelli: Rémusat (Arr. Romanelli for Accordion)
Barbara / Arr. Evis & Tharaud: A mourir pour mourir (Arr. Radio Elvis & Tharaud for Guitar, Snare drum, Keyboards and Percussion)
Barbara / Arr Tharaud for Piano: J'ai tué l'amour
{"copyright_id":"0x3108b4129638f86832a3dcdb4385470f03c3ec536c78911eba4332f20c2a3c74","isrc":"GBAYC1702483","name":"Barbara / Arr Tharaud for Piano: J'ai tué l'amour","registered_at":"2026-06-07T19:28:24Z","spotify_id":"6lvsVdP4KobNe6WqZKqOyh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3108b4129638f86832a3dcdb4385470f03c3ec536c78911eba4332f20c2a3c74. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6lvsVdP4KobNe6WqZKqOyh.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6lvsVdP4KobNe6WqZKqOyh.
Barbara / Arr Tharaud: Y'aura du monde (Arr. Tharaud for Clarinet, Double Bass & Keyboards)
Barbara / Arr Tharaud: Ma plus belle histoire d'amour (Arr. Tharaud for Clarinet & Piano)
Barbara / Arr Tharaud & De la Simone: Là-bas (Arr. Tharaud & de la Simone for Piano, Percussion, Keyboards, Bass guitar & Cello)
Debout / Arr Tharaud: C'est trop tard (Arr. Tharaud for Bass, Horn, Keyboards and Piano)
Barbara / Arr Tharaud: Au bois de Saint-Amand (Arr. Tharaud for Piano & Percussion)
Barbara / Arr Tharaud: Vienne (Arr. Tharaud for Violin & Piano)
Barbara / Arr Tharaud: Say, when will you return? (Dis, quand reviendras tu ?) [Arr. Tharaud for Cello & Piano]
{"copyright_id":"0xfd6e87b9e0a2b6709615fab940568cc14d592743252d77fe046b5497232914ef","isrc":"GBAYC1702472","name":"Barbara / Arr Tharaud: Say, when will you return? (Dis, quand reviendras tu ?) [Arr. Tharaud for Cello & Piano]","registered_at":"2026-06-11T06:13:31Z","spotify_id":"6NDB2wux9KMkjAchaU2dYC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e87b9e0a2b6709615fab940568cc14d592743252d77fe046b5497232914ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6NDB2wux9KMkjAchaU2dYC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6NDB2wux9KMkjAchaU2dYC.
Fragson & Del / Arr Tharaud: Les amis de Monsieur (Arr. Tharaud for Piano)
Barbara / Arr Tharaud: Attendez que ma joie revienne (Arr. Tharaud for Guitar, Double Bass, String Quartet & Piano)
Barbara / Arr Tharaud: Pierre (postlude) [Arr. Tharaud for Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1874995d94120521b7198dc5d5c004695bb73a8933de868dd636073aa845c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6W8cVacKhlajlD4tcfOxG8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6W8cVacKhlajlD4tcfOxG8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d51fbee219d9b7aedb8da8392e418ac7b72309ac62918fb619985a864dbf0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1GaDyqDKqGmYu1Y3R4Vts8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1GaDyqDKqGmYu1Y3R4Vts8.
{"copyright_id":"0xde7d51fbee219d9b7aedb8da8392e418ac7b72309ac62918fb619985a864dbf0","isrc":"FRZ037000230","name":"L'aigle noir","registered_at":"2026-06-20T13:10:12Z","spotify_id":"6IxR4urwb4QNSUICWGG2xm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d51fbee219d9b7aedb8da8392e418ac7b72309ac62918fb619985a864dbf0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6IxR4urwb4QNSUICWGG2xm.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6IxR4urwb4QNSUICWGG2xm.