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 0x0443fccad98bee5a8afe4d20ddc7c479cfb3169fd71f9972cdab7356a6b9f7b4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/106e8e1e-20af-4eb8-8aa5-13b74703f642.json and https://artists.proofprofile.net/proofs/artist/106e8e1e-20af-4eb8-8aa5-13b74703f642.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349589043bb131c3a09bb1d52264d55dc7e674db020f94acb012b4abe330117. 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/USAT22301482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f6634dd702120fe50545378f1edc9eb8ac1105cd5b5c1e40dd32d161ba3437. 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/USAT22307191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe3677bb617c7dbad380f4132bcfeec01fcddcdc1c62a47f95972613bc48ee8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAT22307508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a8f96eb3ed591450520f984c1903c39ebc3f8742f932d62b268d2729794e0. 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/USAT22307509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa796f60b30b93b1626f13fbac082118322ce74914f23b327c096c525070f617. 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/USAT22306303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b107a075ad8e6f08b49cdbac5f398d921adf9819a20da33396626e6546d7ca. 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/USAT22007785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa616717fe3dd89ca3d2a5cda0149eaf847377220fc1a4b679d648f69c404b7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USAT22102732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0850d58edcb8141865f846ad71f5c4d6668abbc4aba6a55fa47fdae3a0e3c4f5. 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/USAT22102519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788ea7d35f822031b9d4b2be9db937a8e5ff8b350f9f3b8a2be54abbb6a5700f. 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/USAT22102733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e5ed3b8bb2e0dc9c47ef1afaab75b8f455b4c2cc0511152ec4f67510c51ae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USAT22102734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8106300cd2ad5f7c03571df4f9abde783c9ad01e910c5cfa9c22797dd477d1e7. 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/USAT22100896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da18fdba63022c111467a52b0c4afb90889ae7d247d1adfc91905ea118c6772. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA52073508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fdd331f09bc0100171322214706468773e4b9ed1ed94f6eb24d728ca0eb644. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYZ1916360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd2b1d91d8ede1727bcaab974ba4008ae0faa48e7330c6b5a15a41fdf3cb9d5. 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/QZFYZ1916361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe213a1b969797734b486909f79e74162deacd742ac3e31ae1046d2506bf6be4c. 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/USAT22404398.