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 0xb023f15b6b981981972d6991c72a4621a8f56e203f4d45138927dd64c0bdaeb4. 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/02fa468e-c366-4d33-908b-dc83b24362fb.json and https://artists.proofprofile.net/proofs/artist/02fa468e-c366-4d33-908b-dc83b24362fb.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 0x76b7b13a3182fc70e7ade17d66936114c2aa5e3f53d286ecc4dc23d90f5df3fe. 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/USLZJ2182222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb838eb064abdbb47c8d598004d7d6e256d1c550a729a17a94bb9f9bcf2232133. 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/USLZJ2182223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae241188cfd299f6499ab2e1b9d672f8127dbe94fc1f68af9d6305a66076cb4. 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/USLZJ2182225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5765fd89042c32dd7de910171145a9544f9398069bce6508aba51041577d3cef. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:50Z), 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/USLZJ2182226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c02767ac6a58535e878d6483c4e1e47ba45be7bfecb36d66fd8b8111733eb00. 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/USLZJ2182229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa382bdf5ff0873fe63c35fe69a899135293252dcc2ea11a27b399067443865. 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/GBRKQ2214871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5756f4a0821b2095858de0fbefdeadd062d80aeda929082180011d5535809edb. 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/GBRKQ2216515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4490afe5f7bbe7c86404c610bacc55e18777cd6e5859e62c22aceca5f7ec50. 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/GBRKQ2216540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5981ea31354534a5ed5bcbdf456393e3bf202547feb6f8193415c000f8820. 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/GBRKQ2216577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d56fa91513146e6c66966bbbc12fe5fb2acbd11f36d07cf80067d493ecd7ede. 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/GBRKQ2216589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa778d5e68f0439ece08d6fdf9ac9c735af1956ec078c2aa2b353fe6f78cc56d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBRKQ2216683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa43700af3d4718cfe794a413cc0015b2537b47313cc073b299bd5193a08f5f. 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/GBRKQ2216691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31381183f178fec2b1fce80f06c918fa90c135fa34b9ab7aa887ec5cc78adc81. 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/GBRKQ2216701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224aefb64f2b5c6be5430742942059af63ee2503f3868294e8a57f387b1be910. 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/GBRKQ2216739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72017451702cf2368ac5b8052658241e90af897fe9e84c3318ac7e6351a97e8. 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/GBRKQ2217133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e17bef75b43f53da1015f18d167b0fb53611b29d4ca4de04535d0dd5c1acb. 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/GBRKQ2217135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe55b30bf76c9f1d542beab430c4295e4fb65cd76745c0030887cda55125982. 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/GBRKQ2217138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7161688634c97fdaac7631bc841f65acafb084ac1b013ca62ec07c3965463c15. 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/GBRKQ2217141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330737a5f31a6074947cbdcea9df5de4ef1de716cc4c884eff451a96dd2683b. 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/GBRKQ2217145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bfc3d9ea92af0f812184d90378a6fe7b80b6874110891e283f248fcf522168. 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/GBRKQ2217151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1a0ee97d6fa920c88739c9e6e5ba0ee6b3d04d35c144a5149903d91590c8a6. 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/USLZJ2403422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f5c0e194a4ecb797ae0a0066c31dce5720a0360af943a39a4ef789b0df8ff2. 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/USLZJ2403423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a18981ad52ca6754c293cc60acea6061aabe42967b77ca667dea232088bf335. 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/USLZJ2403424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0f928ebe029287c2c072bfda8eae408fe88bbfad2af85b3647154dca6f3fdc. 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/USLZJ2403425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551de826497b2cf16e8dab0dd25d496335ec4a12f3c6b489b493995b1e284e9. 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/USLZJ2403426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9aff194a180bb2c788212fb460a414e1d419b8cbb0d3f1e326cdb030f9bc261. 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/USLZJ2403427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4fff6012f72d55cd2c14c338b9e09dc0a43f02d197cb1154d9e17b408236d0. 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/USLZJ2403429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f989244ba0e642c240b281b9ed518fb2a8f3f45a13f05cb654be9ee6592dc9b. 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/QZWV32396327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51388ed8c94dadb74239d291e7e28654a11213dbced21e25c591aac22c2d3ad. 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/GX5MX2398501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2709743d6a3ed185830085a34afc94d8db91d05c5110352f4ab85678ec90b5. 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/GX38U2265889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036c3b3f6bc68b56c3d1d0bd84d00dda26bf29f00e31acab55d45966f8086f07. 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/GX38U2265890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a60a317a20bb3939de982154815b69a3407c33eb5530655d3b72901a873a3d. 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/GX38U2265892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02986c39fbd688d4bd3b88a4bcebba1ab7f8b2c8c00e2de82d5e35d541275aa5. 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/GBRKQ2168012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01e1273384de84d5cf9062a9c71c616dd689490272a7dc5c22aa0ffc7a67ec8. 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/GBRKQ2168013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb4c3cc898186114e94890c1057978c9b939db4b9f9f2987c8f5d9dd32b678. 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/GBRKQ2168014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fd4511a16c32e826ff99b402e0f5401bd12e9412e02f72b84b7407be0a34a7. 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/GBRKQ2168015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbadd812701b134de45c2c3cb943ec1214ef38aba61ed1108be588247aba55a4. 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/GBRKQ2168016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8951339f2d00abe3a90a9b9109a3a9c5bba26dbbe286c142ef3423666ebc181c. 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/GBRKQ2168017.