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 0x864db352a6ee954da06151fa789a95c1051d6bb7bbbff44bf077dbf66afc2be3. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd02e67c-92da-4c94-8ffe-64f95c363787.json and https://artists.proofprofile.net/proofs/artist/dd02e67c-92da-4c94-8ffe-64f95c363787.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 0x3318d93970910beb50030af3d6acc760bd617d8b55d2833077721f05b5e6b2a9. 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/HKG731875937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09b0e1d58ea5bfdf0316cb9ea168e02dc3f55cdee4d9e7ba135368de3e140d7. 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/HKG731875230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab212c918dcb52d49231f321291b01658123c16b1accd35f5092affe698e47. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:04:31Z), 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/HKG731875268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4e3ce39adf9961321aaaf41aacf7ddee4947a8b9a9bb97b2650953e331f790. 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/FRX202111253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e34a3bfdfe2162a83ea0d82e86ce39b3e04f10b06c094dd6072fe4a84fd7a9a. 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/FRX202111254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7142f30635aaeeb42266b4010c9f7f071ea8dd6da3310c5205b2d6f276b938. 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/FRX202111255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa74968ceb6ed67bb33a1b8376f4e48aa8f930a091476d2f4215f5c1a038dd44. 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/FRX202111256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf077054712440ef144efcfdad71a71bd9d55cca4a819e9b03ff99c0ca44a707e. 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/FRX202111257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f984e0914292a988c8ecdfcdf950b79db537be2795dac1c38ad8ce2b33050. 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/FRX202111258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a93774e124fa0dc1d236e74e435b1195f47a8d351623a8ee6e22625c26c46. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:29:55Z), 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/FRX202111259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbfd895b675351853b1d6a5f573629b77113b968942461bbccd0b8004e9f531. 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/FRX202111261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d7da68dfac445cf9ce6319e92202ded2047d03388c207e75652f5c9ef99696. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/FRX202111264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d948d813f2122041753ce250fc21b4b74bee6e3904f8bdaa0aea9506498567. 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/FRX202111265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce70661fa0ec55b2038e25afadedffffd88f4496f213b2e477533fab6674d7. 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/FRX202111268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1018a2e72728b2320b7309001710d8ceb42602d5a0c86cfdb24f4d967553e6dd. 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/FRX202111269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78612ec347aa65911cffea08521597c0e985d28ba6559bd9a2cc1e2b3bd3df4. 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/FRX202111270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f28eda76b3c9fd1c9a06e159084a51f340890e176cc6320656fa85d27ac6a2. 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/FRX202111276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b0052f57439f3ee1c46bd0532aab22222a6df64f43c4bfefae18f46ee18a66. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FRX202111277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fc6d5a6c9990a069f93d47ebd31c7f21df7254bd558eb7bf9acdbb7d241f55. 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/FRX202111279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660aeb12b07d9f0b7979cff442b5cf50411b11f1b4ce1b920161a922ad22084. 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/FRX202111280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddddcfb743f9b3222826b465071853e37bcaf48cc243f104e51b96117027f96. 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/FRX202111281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27231e926c5acf8a06286727b9daf17d83342e4ef07bc6f9808ae222edcf0ef. 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/FRX202111282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc944886164cea48ed92eb204f3eb8bdf55bb35a2d501eef4a38850aba0990f. 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/FRX202111283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f41a502c32f724cc8252d9b9aa2594a4f09f509963f7515452ebde39c3ce348. 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/FRX202111284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fba9dfa5b270d6331bfcadc3881a382c2cdbc619479e95a78294e53e0df1cf3. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRX202111285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6433d571e43d6033c0cf159fbd25cbab6ac37fbf1aca207ff0ce8feb868dbc12. 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/FRX202111286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4259e052204e31d84f685c21329599a842b02c66208aa490b59fa234475d15cc. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:36:07Z), 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/FRX202111288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c389923b2fc98df9a6ac1a587e94ebf1c4dae9b61d9fee5b956db2839e7c26. 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/FRX202111290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3e21d61742b120f6cb407f7fe3c8051a091507a619e55cc9add0858adc6a6b. 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/FRX202111291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c3c2b9a46d6c3f3804beae45d2d8fda9e1b0fd06543c7951796de4137d7010. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:53:23Z), 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/FRX202111292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488ec98adb808646305b44de072d617f431fad4b2b9d465333663820d7915ed9. 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/FRX202111294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702f8348a3ab2a749d55be6020c99cdc42d488a04fe72b45d2120cd675503204. 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/FRX202111295.