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 0x3034a3003c4e57e43022736f3b47efe17cf27d71b34adaed084490a56ededf00. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cc78b5a-9db7-45f2-918c-23416f2c7f2e.json and https://artists.proofprofile.net/proofs/artist/9cc78b5a-9db7-45f2-918c-23416f2c7f2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Midsummer Nights Dream (Classical Masterpieces)
Raffaele Calace: 10 Preludes For Solo Mandolin
Sudden Fire - Compositions by Otto Freundenthal
Mandolin for Romantic Moments (Famous Classical Music)
Wolfgang Amadeus Mozart: Musik fuer Mandoline und Gitarre
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 0x4ef7012ae31f1e005d10765889f5abf6003a92b27e445ba8adaab6edb6f9ce3e. 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/DECH11900034.
The French Dispatch (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7540bc780f47dda62f05d6ecd6905b0b6499d2e68ed26d5800b087a0ecef39ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA172092030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba50786599e5bd8fbe919e4b60168c2de92a937a78cb3b4e75208a4896da576. 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/USNLR2000651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f68b07dad3c8f55f0f76985266ca6211a405cbd48e1d769f503257d1f6977e. 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/USA172092040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68298e03cccbd339f304fac0c142dd7c8c606044b489b55feabf065e43dbfe9a. 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/FR5V64208010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f56286954b2f5e99aba33189a870ec6a9054edd7370399aefa29644f15684. 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/USA172092050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe89d7cc819d556597220531df48339ea58b4c500e871635f9bab2c36d441245. 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/USIR28100272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51776066a8ffc8f3678e4bccf667098237cc364b0cdabe11f8c926199abc18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092060.
Sonata For Mandolin And Guitar A-Dur K.331, Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af781a99b8b6287691afb82930bbb97d1e7feeda8c4517f33d90afb317aa2c6. 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/DEA540501014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5650b9a10c0d89245631584e60223ccd9d87e685df3f33c85d50dd1eeece2fad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092070.
“Inseguimento al Taxi (The Chase)” - From "The Scent Of Mystery"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16f53a3732031a9fe0548069c6228686980b2de9b849375cc65f4cfedf1857c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172093050.
The Berensen Lectures at the Clampette Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99081882f89b1d1a0c075a1f059aedc65df725d87d2421d146d2ded3294e6cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab05df2a825c814fb8d209cf890e7dd9e835fe8856cb8e0a12b329af367ca3f. 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/ITC000401262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78c76e57c65ca6715a17a86b7ff7c03230be5c5972e9b8392e005aa2d12812. 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/FRZ196501320.
J'en déduis que je t'aime - Réenregistrement 1964
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb198744e76adfdcbf1e1166ce58c1b65beb17a35fdafdfc95bd869d5cd2e10d. 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/FRZ116400520.
Fugue No.2 in C minor [The Well-Tempered Clavier - Book 2 BWV 871]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48226077d14e7bd345717e3829c9a3e2c78cd9d09c05fa821e9db85adce020b9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRZ036304960.
Adagio - Bande originale du film "Compte à rebours"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8799ca2a5ccc5b5a6e6135401f9bf35325110b3a1d046e8f262bd5982076f69b. 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/CH1957080200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc17497d1200a677e120be3a850624dbd5c3838a82ee4a370cb283d8ca0fe5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092090.
The Private Dining Room Of The Police Commissioner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972881a21641ebf45d6fafbb1bce1410a0328fc79e9a2013f4d323fa69e9712a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4901a5d82ad92daed14ef11f2b58f3379fc338133903d3aaf6821b152b231a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce49a561b52fea26bcef4bee7552108d6666129c35d02b2cffce3d8a75c6ac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5375dfb52723d81d298ace08ce51d6d9be2c67f33c374570dca148edaa3653. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092130.
Commandos, Guerillas, Snipers, Climbers And The Jeroboam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9a89d02e480391827c1ac069210ee6cd5c0a3c49cb5a00aa9547185bba52c6. 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/USA172092140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad981a4afed952e17506d8e82aa84fde850d36020be3115a4862266b2fe4b317. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092150.
Lt. Nescaffier (Seeking Something Missing...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af41bce41202ef6ddefd294fc7f86c62dc8b5f42a49cab061cdde82c141ea07. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA172092160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92f682f0e5440657a6d2d1b9a8884c25a3e7e8851a618626b0380c031b7c80e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA172092170.
Romantic Mandolin: Astor Piazolla, Carlo Munier, Niccolò Paganini..
Children Timmy and the Music of Europe With Andreas Haas