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 0xac0e8c75402ae53512ec94470b4c94d69ef9acb0cb5a453210fcdb63c7367572. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5da607c-8655-4405-80c3-3178a558a5e4.json and https://artists.proofprofile.net/proofs/artist/b5da607c-8655-4405-80c3-3178a558a5e4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tous en cœur (100 artistes s'enggagent en musique pour l'enfance en danger - Live)
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 0x9f36052cf209d1a8871be11f4d1324ceb6f06e89959f405566cafdc0630ef027. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7Y71300001.
Barbara / Arr Tharaud: Mes hommes (Arr. Tharaud for Piano, Double Bass & Accordion)
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. 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/GBAYC1702462.
Barbara / Arr Tharaud: Y'aura du monde (Arr. Tharaud for Clarinet, Double Bass & Keyboards)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa8b0218cbd1f40861f801ca39c9e962691eb854454d335701eec284305cedd. 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/GBAYC1702467.
Barbara / Arr Tharaud: Attendez que ma joie revienne (Arr. Tharaud for Guitar, Double Bass, String Quartet & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603eee1bb4cf6c48ab0bb26a8e486c0b8bb2816ee9fecedd239610c9858c55f0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAYC1702474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada381bf96c4190e2a35679adaaac1b90144f286ccabe6e22898a092c3b0be2. 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/FR7Y71300006.
Quintet in E-Flat Major, Op. 87: I. Allegro e risoluto assai
Schubert: Trout Quintet / Hummel: Piano Quintet in E-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02685a24434ef1850d671c40d3cfe1eab0abf4ddcdc494c6ad0d4ba97a78afe. 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/FRZ140218010.
Quintet in A Major, D. 667 "Trout": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6025a4e0c15359149b2c91c586383ac0a3acf0ba1a3ee49778891f2172d88f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ140218060.
Quintet in A Major, D. 667 "Trout": III. Scherzo (Presto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d7fe1c49417740be4a074028cbc83269db8c3c839a3bbd7e9c64b0af3fa919. 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/FRZ140218070.
Quintet in A Major, D. 667 "Trout": IV. Variation 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3650ae27856568d1645989fe288220e33ed039ada8d6d5b9c34cf38a833fc47a. 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/FRZ140218110.
Quintet in A Major, D. 667 "Trout": IV. Variation 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03d61517ea66fd9ecd4b9faf55b6046487ab127ccc9f47ebd2866a18c1af36a. 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/FRZ140218120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9084df76de76888cf8ff4559d1a79776b3c66fc51ba348bfc07de374913bb9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:08Z), 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/FR7Y71300013.
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
Quintet in E-Flat Major, Op. 87: II. Menuetto (Allegro con fuoco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5077b9f5c225a8f3a5f8890a653f021bb6e0e48f5ae3f3f3a1a23b8215a6230. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRZ140218020.
Quintet in E-Flat Major, Op. 87: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a298d5f3f9582e2720989e45463f80d7095405b373a3d6270fa0fd280c002. 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/FRZ140218030.
Quintet in E-Flat Major, Op. 87: IV. Finale (Allegro agitato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c553f5115e88d48084a3fa39a92487917f1c8550047f5a8369aa0b74c269660. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ140218040.
Quintet in A Major, D. 667 "Trout": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411cbd6376b89e3723e84e83d8641f5e908f5aa6885e4abef0fa49ec1116b557. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140218050.
Quintet in A Major, D. 667 "Trout": IV. Thema (Andantino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03010475d2ed90f2a31ad3ccf5fb630530c8820e4aad881e78b9db5d61a0b4b8. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/FRZ140218080.
Quintet in A Major, D. 667 "Trout": IV. Variation 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea76a0c6a2c6dd876adb57594bfa19b12aea13893f52ccdfe9e7858393b1ac9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRZ140218090.
Quintet in A Major, D. 667 "Trout": IV. Variation 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ace5934efe9b1245fbebbbffee6ef9c8103aeb4b0072cd5dc1b2892cdf26d44. 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/FRZ140218100.