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 0xb0afba17a9cadfa04c581f9bd9fed612f87853a0efa20ab46a155618e423a466. 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/aef88749-8a9f-46d1-9df6-5abd6bc2f017.json and https://artists.proofprofile.net/proofs/artist/aef88749-8a9f-46d1-9df6-5abd6bc2f017.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 0x6c30334e5def116fcd69da84aae5e882d5bc86cc3fc6cf8b5d9061a3078a6d18. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USEM38800421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136409922754e6edbd943fc1bd7863810484d76bcbebcc2584fbc9e58e2e693. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USEM38800417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1591bb90eb8f696883f3e5d15b891b8095adef4b05c513b9cbf4ff1d61369ea0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USEM38800413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25efca07fbd673581662d483bb268c7d36f2aba479a10737994801a999c39b7b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCA30700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c529c1e6553125d5c175a26b4f8e2cd5e5618822328ef8fd1e6858d834683b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USEM39000532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a1b7bfa571586e22496b9e57109772dfdf8df19ec2612255c1a1daeab62083. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEM39000533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bae4523943f3503f60180e76123e41606bce715e93b4db1cb7bd3470911c36. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USEM39000534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6443b11c28342d8981ba346f67c3410767356e896643b213ea2e5d97d293560a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USEM39000536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca8a45af5b795d0585fa7a97d386f64ca168777280255f7ed3aec8dc7f0828. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USEM39000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35daacca11c6c80f8af17fed9c3f72b1a66cfd83c564d88ade0971064af1f1d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKYZ62200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ea26afd91e62d8ed57ce48c882762eda492300146303fed0387fb28a12d7a0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/UKYZ62200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb3114d4d5f7e25f50026f339b9571b0e07b292517adfad2acaae30409836d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMEZE1819396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54c8bb29862cb7d1e7be6a34ccc14c230a083b48308df467502a45bf6b2cf7f. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMEZE1819401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f71c664e45af96b5e57f583e6f135771734a622d2a739cc6830bab130f812b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QMEZE1819404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec37cec13a069f070faa48561dc319283df1ded5a83371617f27cd9bfbdc7fcf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMEZE1819400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f373b024ff2ac617e1e384c39eec545dae0a90220a2cf8a7af2854ae392fc16. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCADQ1879037.
You Ought to Know by Now (Stuidio Vesrion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8c6eec73540cd5d8d9ee2cca18e89808a5f6f62d847847f4fab3601c470c19. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCADQ1879077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2648ec4cb36af1aebaf0738af06899d175a67845902b3a0a11cf27942f5b3624. 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/PL2DY2400535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dfee0818bdd07f0ecb8b1ff2056b9188f5a7ec056da7b929242cbaffebed86. 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/PLF241300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3dc17dca4a49eab7aa5bff6bf807c5a2303c7fc596d4361fa3cf0d3dae5b19. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/US3L61229681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c947196d6bc1f0ab80d786e74323ca793406569472c345ad8a7e250d9fbbbe. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US3L61229638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cecf790f9a0d5e9aa6a79efc3b3594a3354244784f3c71db22100a57dfb0ae1. 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/US3L61229699.
Rock Hound: The Heavy Metal Collection, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c908202b3265d20526da73a16c8dca0df5717576b3d4dd7006d0950967c3118. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US3L61229152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d7e33509a8852a863012133211845873ec0e5818b7ceb6304eb9cc35a08c4. 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/USEM38800247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1170528e0ea6d91781f5e1577fcd84f260509ae00fc9851220a85459a9e8bd01. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES50A1800892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3472e1580e6c308d188a70d2aec4c08bd58f395084a9bcc14ee8a5e5cb3221. 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/PLI368384000.