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 0x952f6967550b552c08e163ab1ab9d1aaff543ac34f26367928194a1281ce3f4e. 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/2114e533-2944-4dfe-babe-1b9801f2f4c2.json and https://artists.proofprofile.net/proofs/artist/2114e533-2944-4dfe-babe-1b9801f2f4c2.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 0x5ff63e9eb53e4330cd054cea0865a0cfa3a34c9f49e0e731252b8197a1d328c7. 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/FRX452250034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fcf3f7c396d01c0d6ba005d47d73be677b9cb6bd63558846d892d5cf1bdab2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX452250035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e40d09fed69a1345cd00c54288289d8f13c3ec14419653ed4279f478f559346. 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/FRX452250036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ceb4a0575c20cd1e3f9174a2dc1185af9c64f1f573ffe9c51f5e3311e092a. 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/FRX452250037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b21466ffad2286f647621ff9669c8b871a01b8d9025ca3802d9e2adde8711d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX452250039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31ab8241098f6ad9a0511be35fc67f36634ead942e96d63582f07f62fa544c5. 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/FRX452250040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0f74006438d54244447530b2d226f2e32cb94593e6a759836b32a4d6fdfec. 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/FRX452250041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03109a4d9487f90d6b803e3df854deab72b80a3c09ce30bcae72e98b825efd8a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX452250042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3146a7dbfb92c7ece1b1c78bf98dc3e4efc8e456ef507190b751f34bff6894d3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX452250043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5347575322fd55efc67e82adf5faf0071c2e6e084268349a2f585006be9ba5bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX452250044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e5ac8c41ad3f92615390bfa5be5f85cdef143eea6b643d8167ee26b07c115. 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/FRX452250045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b389432f1874be8f6f48a116e1dd5c848d5bff79da5d223b8e4cec2f0e0ccc. 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/FRX452250046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7088e2eab967e59ae99e2d3aa148f1a90625fad6234de51c87619aad9af8885. 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/FRX452250047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fec01f448454fe633beab5d6b22c8e69a14785c8aa9abe0660704fda4054255. 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/FRX452250048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92a67f88518466b613554575382770c40f56a4b123dda432116e89a0a911d81. 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/FRX452250049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5f61ade10abf167894ce5a117d1e72b8071dcea0ed6e709d33a5a78cf3fd8d. 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/FRX452250050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d1da9e128234764b932de5aeaa9ccf6a7320a54dec79b9a30de7bc0e494d02. 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/CNZ632201426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d2901270d4788241c4e036d7ba24de1fab5401c966382a491a1eabc9794f1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab451ec60843d9a9ce4d8c1ec07d72d8c7efa0d9eeea1ad4f72820c4611d0914. 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/CNZ632300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1468fee9f9b5a3a5122387e5aa6542bc72e403445027a238d9a60183e85de6. 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/CNZ632300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550bd0b5977bc4f980bcf8a0e9f4f97e5b9d3c8779d7782a93d94fc5a16698df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46d7049bc6959bef7400e9cce7013cbc1867ac577fb952f72a9bb53458b0471. 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/CNZ632300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683b947090750ab22809b4158e45f5ee163e8e4a78466ee2245da051b1b38e43. 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/CNZ632401095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435e6aa2607fd500aa688d5c31ecd6f43f27735db172447dfba3cd16ecdbb1a9. 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/FRS182141494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bb28d3335ad3fe96997c36077084a931acbe05305ffabe13dd261981a58387. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRX452128285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f83e5ce41c3244d53a980dd3d12579471c707fbfc4f127d07fa8af9760ee07. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FRX452128286.
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 0xa5f538ec37432217be730aa40543420320d1dabd91fbca07a49d1da60afeeef9. 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/FR96X2112417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e4e55c52f21be2c06ced4f8e9aab5d335777729318fb04792a2897c64408a5. 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/DGA062044797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d017e220b81bb9e908ab435c22e08d6f051f027a99fe62ce7245fe7d8193d64. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DGA062044798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8185f3361bc46c215358d90846ec57bf72211056861d6ad3b885cd44d4d003. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DGA062044799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417dd73bcf060c123475b34640420c3be8bca4bef81961d94b867b0a8431c160. 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/DGA0T2402165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e2bc5e417280255091a4ac567bfac8538ad3ee34feb5b5315ae9ae3ce4f8b. 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/DGA092429744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dc2a4a7efd9f81d4e4b027a48ee9308d9326bcb088503081ddb7050864b8b2. 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/FR96X2559164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1fa43def911bfb719ce4e92399541ed5920e4c7492e52bfd6dc00c54f80a3d. 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/FRX872529901.