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 0xdb078da8188387db24c3864c946bc026ad044a0d2b63ec3a2b737810a0bd3956. 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/75ab5cbf-4b63-4c9e-8fac-0cb5bbdc19b5.json and https://artists.proofprofile.net/proofs/artist/75ab5cbf-4b63-4c9e-8fac-0cb5bbdc19b5.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 0x8ac0f2ade1ca05c84cb80f7e07bc01f4d5957363a4d5981cc9a8f5042276ad18. 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/BKNU22500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840f8663602d37ac9eedbd7d3c8a21cc14116a46cecd5cb0379e903d390627c1. 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/BKNU22500147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139ffeb926de9281189e5b8b19da7b5d68bd4666afe6fc91d2ffdbad12c3c74f. 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/BKNU22500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd26127efd07e8501033c42f6a1c4c48d180b37335b40ee3e25ba080efdd8d89. 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/BKNU22500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10912493188639a3a08e82efc3e3f73851036057abd576b0d8a0c83e0dcf4294. 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/BKNU22500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0aea44d6c51c22239edcb8f0059eb2c51bb8f1f756b9321114beeac62ba5c. 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/BKNU22500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4327b93bf68be3571ec47508b57cbf4743cf5917ccd74e86fdd839169926745. 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/BKNU22500115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde5539be2ab1924437fae6f791f93722b6d41b93673260956c43cb63d52891. 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/BKNU22500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45517757981312f8627208de747ec5d8e437b7ee196cdaac24f7ddc1cf2950b. 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/BKNU22500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6e1899da42c0df0c5f6880baa962bc879fddee2a21bf5c384d0039143f4e31. 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/BKNU22500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fde5539be2ab1924437fae6f791f93722b6d41b93673260956c43cb63d52891. 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/BKNU22500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3b2a9685b28501d67a8e6ab6eb9b6d9eb4411690d9227b9aa31cb837d65c6. 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/BKNU22500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45517757981312f8627208de747ec5d8e437b7ee196cdaac24f7ddc1cf2950b. 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/BKNU22500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d282ca0d7e77a8057407a324eef7308a39a48e8d76cfe8093f6b096d4a695e2. 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/BKNU22500051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d48e5b4bb97ccde8ddfcdacf427cb2706149a524054941042627c27c3ce712e. 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/BKNU22500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0a4fde6aa963d32b3e65aa40dadba8f2b4d072379f0d9e64a892636529f5b5. 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/BKNU22500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41359565ba1c5cfc63a6ef7b2043b8aa1a298482c17c79bb794a982cab119c10. 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/BKNU22500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf49791c005d85997e09357bacf55ac8a251443db55f410854a93af4b86be4f. 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/BKNU22500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7fb5b83ad3878121a192e691afca2f45c69da7ee066fdef1a4af27eb2b7617. 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/BKNU22500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4279fd73cecc912d77e3c7b92bb1ed6690b68d0528e306530d8d5e679e9d913f. 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/BKNU22500233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22c852a2677499b80a616934f3f5252b6fcf2b4ca6fc9025aa9e7ccdfa1c767. 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/BKNU22500222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adbe5498b42fed9f3465351c8b52f9921555825c5ec4a00d7aa612e8b2ec440. 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/BKNU22500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed20cbd06f66b401cb142e44e7d927cf61a744a5c7a94f4fcf01aba5a2e3316. 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/BKNU22500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f11b7a576b5db5e010a74c6517c7d85f36df27723d26e7e83fd2b3066122433. 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/BKNU22500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f8647693524be3580e90f5f530c93c1827e712b8403fc6e53edde0492aa61b. 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/BKNU22500151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b379e4738fe462b2168ff63de3a78f7427696262d3117a49b789f038bedef. 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/BKFUX2301121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3440c464c21e2e18d4d9605958cecba9c8f4880819b751bfd83521f306fe36. 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/BKNU22500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9fd8b16fb193a8a95d5e7e503a00d2070afc0d2d87c516eb073c1076d6d6ec. 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/BKCTD2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f9ad7098a0e9e43aca362eedc44b9f994efb81602a73ee1e2ac4cd99563f89. 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/BKNU22500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14799fd500a789eb31c313819ba3c005d90f1c59601d5e5c446066d0d86250cf. 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/BKNU22500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159587a606cd3276fdc52cfc28498eaefa14f071702885c7b46d50e1635e5089. 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/BKNU22500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71183c00e74a608c0058df11724e7d7292d2346d8efa91ec2c3a1932f8b83f. 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/BKDFK2400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0bd4666b618be9d59e67d4039ba0e9963a8845a317f296e8eb6f0ad03dced5. 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/BKDFK2400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fc68372aa99f7dfc04cdfed229e2927f97d8f72115b25e45fd5888eb118a31. 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/BXKG22401491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57697ac76a882fd431a8b315913aa6b5634d17ea57b86cdbf0ed0d7ceadb0ef. 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/BKNU22400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba62d55dd70ca39a48eb739a21d428020c7a22ecf1b3c12bbc63e8f2434825e8. 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/BKNU22400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cde52e906ff32711bfed72ead50a758f0fa31412d84f82a127599fcfea96d52. 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/BKNU22400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1587a98f0f0f9108d718b2c24adb0d9a7663845625c5b00b589da869da861abc. 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/BKNU22400082.