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 0x9eee5497d2d810317abe803208591603fd7c9d63c2e7e0d411c6ba5ccc061b47. 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/6146dd71-9154-484a-8fb1-de2087cc44fa.json and https://artists.proofprofile.net/proofs/artist/6146dd71-9154-484a-8fb1-de2087cc44fa.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 0xdbe05df4df953e797e85e66716b15f86ec571b4682267055f441cc661b9af1ce. 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/TCAIH2464770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0249d7c9bce167a2386c21dc8a9d86937206041660ecd90d6ce14d5ba0dc38c4. 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/TCAFH2020667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4421400796facd3dc070cad3a687258895bac904ddf2d960adba64af60303be. 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/TCAFH2020672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4226670e4f2162e559886bb746a8be614c443905de181b3a5a6eec371b3ca9fa. 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/TCAFH2020693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3599748f5a145be202586fa7e9c45fbb2e995259b89b890c98a657b5ad4654. 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/TCAFH2020711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6413ab7bc7b405d4690a15eac0f33cb2f6280c5f21bd3c16427fe96934b8f2b. 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/TCAFH2020717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5845969d2ba922f9a9140aeb12bdfc500e845e81045f7a961840d07efdb443. 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/TCAEN1969794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13e8acf5ff82065c53d49f42b62c3eb2bd45764cbf931d570c762474f1aa067. 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/TCAEN1969799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc717f29110ca85800883c67081a0bdb023d0547c5524a5890927c41b130a110e. 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/TCAEN1969800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059f519c45e4cfe3115f26e46b0d8f2973a73ea7eb5db75459ec0ab49a5cd26c. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAEN1969814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9563ea33a1f2ddc503605ca0971eef801489232d9e92159e34a4bf76a8c7eaf. 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/TCADM1837894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69956c955c95a8e7fa940520d3f4fe74a9ebee8c8435c68784c274ddf6bb2eb2. 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/TCACQ1695331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ffa4dedda11683c3f8a5c9f3f5da812d7af046e4b94fba90f665daca200298. 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/TCACQ1695337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f03f36478b012cd636058d0616d00453028bed9ab3fd90cd8ffd51d7b8898. 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/TCACA1410774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0e0313ab25704f9000e7f912adefa84103a21b279df291efc370c6793d8fe4. 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/TCACA1410775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4628fa77d29bf54bdc8a3c3df11832a4c114bfc20d64a541b8ac8ec7b0225f7. 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/TCACA1410776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2075ccabd3d89ac34ac5076159e19a952a05396e13ff89a8a62ea8eb99538502. 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/TCACA1410777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570b05a6aa6b6fba00ab6f3200d82e8d143a24fbcf1b20acaf38106babccc0b. 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/TCACA1410779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555242389c567387d1115c651c8543f54e2baeb21a5cfa3c56e4d484e335cbf8. 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/TCACA1410780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30c82e5fb7e8a767e758d301261c887b2c483b03f4ee696ded77c684313c3d. 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/TCACA1410784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb188bbae6f4f5b7c11bb6e760c1308d11b9b1cf948c7745aab21bbd687b720e8. 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/TCACA1410785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99842ad0cd50dedaead8ea0f40d8bf8046f8ff5064872188d7e29c3ff13584e. 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/TCACA1410786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd68de12fddb3a0e4051688a8eafa051b1e59dd9ee200ddfe61a265b40a8b7. 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/TCABO1302455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf2f3ceefa9797a6af4d55d876054557f2aa6b2d1be01c9d380ed0bc458179. 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/TCABO1302472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c3c35788dd20ffbf899f339cdd356840580363ce212ad4cc7dbd82e9751970. 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/TCACI1500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd77532b29edaa56cb8267eb32fee70e7f192c739990370aeb77ac9b16da3d9. 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/TCACI1500790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9753edd6cd2b6fc5c9fde0969e4e804604767e03c11a0103e67b02a2648fbf5e. 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/TCACI1500798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ecd5b36b76eb2cbe9e57eeb3cc737deb4e583e1743e2fd2fa7fc0e14b3549f. 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/TCACI1500800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c31a5e4b29370895704a663f75d19d4dd60d0ca553b2d140d65b49b88c6a91f. 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/TCACI1500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74e37de99ff3ff52f88aa69b5142bc21c4c93d6ab5cf16bb5a30a940c631eac. 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/TCACI1500803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769346f24f702f039c5cf9a43c11e157cd72c68b23abf5ef3c5874f5148f9f84. 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/TCAJT2582107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5c98d72959892a251dd5755c25a214d0ad664303e6c9368002965aa4ce642. 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/TCAJT2582134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9e8f6d976d78bb5eb34fb3ed2affea36f4ccb7a87a17343e660410d2e7dd0c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:27Z), 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/TCAJT2582179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c06bf38deef1f78fbcf195725b1de43ae70fffacdb7094df35e2ad4118be8a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJI2525924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d2a8b76e3f99275837347563ddaf75707699b18537d8abd8eb0d6f5747f189. 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/TCAJI2525928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec159c4fb2abb851ce5b17e919f7569a3ec050d2166ea4a38f624778d218e5d6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:01:45Z), 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/TCAJI2525935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5b0acf57344f0eccd158a72ac9e97637c71e5eaaa3184487438a6c0c222792. 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/TCAJJ2525955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d45e5b941680bb4e65d1731656327eafa9f1fb8cfc0a80e805d812c8dd951e. 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/QZMEM2585988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1e38eec1c020f30f5892869fee1c9524278e05706b9f3c5e9cd65aa491ead. 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/TCAIS2433469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc116d512a6b495899522e0080ccf4a6f43107933b4bfb856b8cfc58a99097ac3. 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/TCAEC1939582.