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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abee02f55ed991c5c6f04cdc6680ee1422718c1aa63106c737137e0d9031eca. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92273bf3-ab9d-44c3-b2fd-df79c6685a7e.json and https://artists.proofprofile.net/proofs/artist/92273bf3-ab9d-44c3-b2fd-df79c6685a7e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39caf5f38e9ac076c7e53a1c0aff024e3ceefaeb9a8c86f793f84e85c087f62. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZTB92308901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e19d85098f85be51dbc8c641ef5f460eefe1ce7824051b4ba5b6067a0488b1e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB52331945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62fddf3f8dec8d6ae54a9936ad5a3d9f02928f15df387d9ea116b569cc9b54. 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/QZTB92308903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb650c0cfbfcebf422dc323886f7ef6fdabedcd7e713e74deb2baf9a41f9e78. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB92308904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf50d67081d23ed7860f3697e4ea4e53bcbe97bc482737dc74eddbf30cb730. 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/QZTB92308905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710ae334b25cced745b1f37421d7296abe3be076558d1e05dcd0f06fe32f861b. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZTB92308906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5911d43ee61f2587dd123299c677eb6e3452f39fcb1a6203b0109be479dceb95. 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/QZTB92308907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb199f1d356552c770616a417bd694e713e32fd826ca7cf7e8746c84065f303ce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTB92308911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fbf3a33e5d420504e7d2fb7f7282e63c43cb15a10c9ff0026124dc7d80b274. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA62280888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622bfdf26ab63424917ac055b656f8d2794cf1fffeaa58e8d56c2903e8891ef9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62280889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967c8f421ac55187e04c32732f156ae64ba8dfbca0a98d61a77efdfcec735b23. 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/QZDA62280891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbe6dc597c69d9bc7a77b7308f109f1177af6836c46df1adc6f6f1fd5454d03. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA62280892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59146e36da796fe92da10b42fb795ef166cf1db428e69ad7d3dfbc628994b7c8. 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/QZWFR2341564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e19d85098f85be51dbc8c641ef5f460eefe1ce7824051b4ba5b6067a0488b1e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB52331945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be508d07b86b8f1fd2a5cb378d37562f828fd7e5f3128aa588badbfc9b0f63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2364793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318abda94e559b39bdb74a1f42a125e6867c2476ed52ae57f533f57aa50c35a2. 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/QZHNA2336011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7567b3288ffbc532ba9db8debd8a825c1b94771a3de291dabbb32809983541d3. 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/QZTB22225898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305fbdbbbb8b363b49b1ea710e6b610c87387da1ba83754cc52697fe83b234c9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWY2203962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceceefe259da3a5a9426012da7b3ca8991b972d594534c61a2cb8c8d4ad9ec70. 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/QZNWY2203963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e08d3fb57389a8bd8d07df4c140fe8f07f92b7d6e2d3bdf65bb54f1ab51efb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWY2203965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf729ecdcd6c4455954f5a1cf2f912fb7126eb97714daf3d459a92950d831e383. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWU2277174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adb5a5afc9b39f9bdfffaefc434bf3eabbff7ab6bc3db815034a96944079105. 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/QZHN82289005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bcb4cd8d0deb37aafa2c12882d0d0b4a0a088f04b6de2163b669e4193a21e8. 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/QZHN82289006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dff976472201d274d2139f3630022748278c0d16fdd2f63d6e17ef683de2be. 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/QZHN82289007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed05d5482796c8da89b5e0f984d8a405161b1f1d6c60d20f55740d20abd38f7. 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/QZTAW2456186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883077435f89e2a013e4d49881f97f26843c1ae7784349abe7257a453b87eee9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2456188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60d7fadf279eff8fa7aac797fa861718bd688dff492ec03d24243e1fd18ac6d. 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/QZTAW2456189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd12230042bb39056cef64c38ecf16568d5de4b778bd1ea35f888aa65deb0bb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAW2456190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5086dec7bb14b9aff2a7b23589642d47198fa0b0987d6cd434072be2be472681. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2456192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b7aafcc53d7fb1f54d856e536fc1f429bf2a28c7825914f90a4cb1dbecd493. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTAW2456187.