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 0x48c2d81b6b704a8f37cb20ecb94f322c0f72465ec91839de78877884d63ced2e. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f53766bc-12e7-4f98-8407-e73ddbdd7568.json and https://artists.proofprofile.net/proofs/artist/f53766bc-12e7-4f98-8407-e73ddbdd7568.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x78e721bb8f3471fb4c52d92e2652d7a6d5eccaf02277b0b80850670e9feca151. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEBL61080055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c76266cfee628c8db170f6df415fa9779ac1980374f4d707e83b34534b747e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMGR32065622.
Dame Ne Regardes Pas - Luca Perciballi Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdf31d32f427cf8320ccc7ba2aafa0b02e372a3387061cfb7e9bbfe27886dca. 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/ITUIL2200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27487c31e2fe27f57ab1f60edb115357d8e68ded86adb89eea93f13b4856a978. 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/ITUIL2200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7409cecbedb821c06aaea7f521cc7ac606aba0376795ca99d7cd5dc647e65f30. 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/ITUIL2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd60432a310ca967e6d4d6c273c4e2cb66b3701515931d3d70b12185449d9b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITUIL2200093.
Fra la via Aurelia e il West (dedicato a Francesco Guccini)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81415daafd8e7fdba957ee8a47022423e20a65338892669bcb25f3e45ed2b216. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/ITOOJ1700046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1107169e3b3b21b18634303ac58152ceb15dc87e684ec07e0d7a06de2da9ed8. 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/ITOOJ1700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc463ad8cecda3593cd991d178f067ccd065c7973fb1b30816cd147f881a98ae9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITOOJ1700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47c240d91528339fd0dc22309254285cd51130516c691867c226a17f723a0c5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ITOOJ1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f9e05424726ec655bb3ec4eb794717f01726c2e0780057bea5b3c2b6ebd79. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITOOJ1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df388bf59b208ad2de90daa60302221e147d945dbc84bdd15b0a9b5510ff404. 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/ITOOJ1700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe946e21309371dff86262c6d860cda0053071c53e0a346f98c4f5de590039bd3. 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/ITOOJ1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc714574d223133e030bbaf22edd36c8410895e6a97b699d852177213dbfa81a4. 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/ITOOJ1700041.
Orchestra Sinfonica di Sanremo diretta da Vince Tempera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06a87bce42c069983159e7382a9d732cadfd7fe830a6f384f2696fc2b7835f1. 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/ITOOJ1700045.
Hunger and Love (Tribute to Billie Holiday 1915 - 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d569be69225f3a994e9388a0f12d8146f8d51316987e03acd87dc653a0ebf6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US8JA2425001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e6a2d562548fb209ccb8413e83ad4fc1c670bc50b3125599b6bdd2bc7ac75a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/US8JA2425002.