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 0x4a5bb46d4669f5d0aa4fe90ae22e0b008ec13ac825c25a1f4ab86d6a96a6b3cc. 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/2c640087-39ff-45f6-9480-900ce1939f96.json and https://artists.proofprofile.net/proofs/artist/2c640087-39ff-45f6-9480-900ce1939f96.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 0x04c063544f2c8a9e643358daf316e25e0aecc1c74ac2ed7f0f5ab4cabdfc9ba4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2271491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c10681ffe6c812745683bba3ff478b30a3e5fd7d09074946d695e2cc282d027. 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/QZNJZ2336097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ef998d8f4360e8d483db6341d562f823012fd1b1cf2a9e2ab80f52ba46f5ed. 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/QZW9M2362390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b026307d6232034d3e18e594ec4d0246c5f2f829a1eaaa93e8e56aa61c6b25. 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/QZW9M2362391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b11317b61f21f5ddd59c2b39dbad5d8e66b82ed23666473b9f8cea99810a6. 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/QZW9M2362397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe7b490920d3e1aa7565cfa9e3025cf27e47e91aae520b0b15b023f8eece82. 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/QZW9M2362398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ca380e6a9f657ad1f496b545a4dc3261442d805a73070cae201d8dcf5c4746. 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/US7VG1806197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf450c2a726154f7c1d27745b6b295cbdc18d0e8326a5c84054d2fbfb7259c072. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US7VG1806201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0629e1eaa233ba9b0e61a242129122a2e930b3003d30d30ab822bf66eb04b9bc. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:20Z), 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/QZ5AB1903411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb8c41e0a5d91fdd08133fb8bbad2e83322c4a63735e480069e0e322e55ee4d. 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/QZ5AB1903412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4bcb8cc19e24fc7f11026f0bb839c9362d54f9bcd0a5427fe5e5dbf1875dc2. 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/QZ5AB1903413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c10681ffe6c812745683bba3ff478b30a3e5fd7d09074946d695e2cc282d027. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNJZ2336097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598752008eccbb9f6967ac60811b94749e4faf25df7a69f631d5e7902c8acc9b. 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/QZGLS1983305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971cee153ad0bd0b9efc5dd2e5e3f46f6b8386dbedc225be59f3472ba12bc4b5. 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/QZGLM1983180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e8981f218e0e6c03088177f18f8b766c0a08825788719faee43fc15ba1984b. 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/QZGLM1983181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982bc003998a2a829909edaebced68543af6b4c386fa3f3b4edcdb6ec64b764d. 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/QZGLM1983182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ae229719773b38860d1b931927e933f1eefc0eca730f1ac492500fcaca82d4. 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/QZW9M2283148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129563205f2c08d4545c23446b911d42c9eb52497025f183f9ead8c0cd5ab19. 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/QZMZ92236666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252528de487f7b180e387c4f324389c5faa0e0792fe4f124d767b29783c4ab6b. 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/QZNJX2464672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5978ecdffa5bafed5dd911833d9f4ee48e6feb874f07cd21cf4212c8b5be9c92. 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/QZNJX2464673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db18ff2d0e2f145cf1626631eff7d8b2e69087a366b1907790497157f0b8349. 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/QZNJX2464674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf39526fca0e7dd29c82f92880692f1bb67264eae452a41b19fee72d2f5a80e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2464676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84115d44cd989a4faf39bfed85bbb9b9d421dfd38bb66f3afd0990011fce126. 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/QZNJX2464677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6018afc266fc85cbfd131897f624a0fa7456f4ceda9ce4a42ed144f865f45. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNJX2464678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd18851942823a7524ca70e27d1abcc9b86577e63f8d2d8f80c5a9c8bf8a1e5e. 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/QZNJX2464679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c35f37753a39a9e547c7a5d52375d18ea0d4698e26c810547b412c85c5ccedd. 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/QZNJX2464680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6869012d439d13ecdd2ea7f45585977a85b3c9552096514e3754a0963163aecb. 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/QZNJX2464681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea941c0f747fcc634c5fdd451139bee1bda40d76ff0b52239e89ee2b8fe903f. 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/QZNJX2464682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a40fb8dfcbe0c2d91ea67ed777c3d7cf95f8b21e62d3a987b7db361daad5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2464684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243b2b223fad18bbf436b2809306ba6b828ee2766187d23f0dd14158a1fe360d. 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/QZNJX2464685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271e6c7e0d752903eccc2fce4241f0263a8388d7c501e15803e78eb930cf887c. 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/QZNJX2464686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807266f90681727b6cd1fd8c8f253383f9c1b3df2287072c4b1cef9efd475344. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJX2464687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187987ff22b814c2e1b73620b658525f90f5e9196b92317d09dd1d32c45c4486. 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/QZNJX2464688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997bd25713aa1f391c1e5d91a9dcacd24459736fb515010193887ce7a6a8331e. 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/QZNJX2464689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dcc020733e16d4176ca9ac06cb0dbafb524eb567067272bca4f088234ae9c4. 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/QZFZ42534395.