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 0x83631c54a67ac9e3ab61ed4c39df4634bf0e67b6a87a85cab97ca4973329007a. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d07fb0c-f633-4ea0-a397-ac6c36f19973.json and https://artists.proofprofile.net/proofs/artist/1d07fb0c-f633-4ea0-a397-ac6c36f19973.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 0x03ec119ff1cfa462013faa970cbe3d57f5baaf5563a295d9085de402c22d383e. 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/USA2P2301294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510c7c27e1987621c110c93b10d5200ab7e83cbd4590229b07d9bb84549b1e9. 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/USA2P2245112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9e408c51e0845221118485a6837bd6a4c4c3482af8dc761129fbe7ddd5c9f. 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/QZS7J2203166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051d1c00627dd88ec9542168f0a2a508ee821c0ab77da975cf06ed90dfeb7814. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USA2P2301291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92361620035e5787bd722dc7517ebfdc87a9bdea15107c0ba9d7bbf1fb6be0a1. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA2P2301293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef34bbf3cab97a4ba28c5b90eeb153459a7031a8cdf63b8e5111e7756849624. 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/USA2P2301289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede1e5b62fdaf640559d7cb76f165c942678da306ec998e8f18f76dafbf9958f. 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/USA2P2301290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a44e92cc34e585cea32e77ea102f3f4b8bfdc7607fc98ffbad9b39752ccd3a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USDXS2200887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d29c5c6179f85fdf541dda95a6c9dfbff4396e583f3dbc805bddd6e23edfb. 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/QZS7J2239073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54243c640d4a89193193f06241a4b2ba6f977f3b92e804dd6148d647ca02f565. 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/QZTLA2263276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0c48c493128caf24c93277264f122e4ec4bcad0b7d119290d8c1f3884a8474. 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/USA2P2301292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507f1fd6630722afd64fc8d2ddaba1ef051edcd131f2aa70c093bb5b79b1b4a6. 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/USDXS2013699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef79003cdf449e09ca6585fb600c92eb3e86372d2a658ed595a2cc1cf8e94963. 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/USDXS2013695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d5c6833cc2a488f1f47ef6342168b7fc5403123bc900715efe53a4cb2f9628. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USDXS2013698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5de9b8f0779a1908acd27cd1f6f920db18d7f3c36ce69dff3024fd139b8e88. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USDXS2013696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74efa882a95640600cad1ec7cdfd669616d8e43fb35e10537a41263b435d9da2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USDXS2013697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70b4feeb0929c6faebb6044e9e1864ee7e9d919ca38ae15005359a4f6fdee1d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDXS2012751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4bbbfbd106d160f5f8d591fcc726947c79d7c7d8b994a8d2ddf8dbce912c52. 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/USDXS2010064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9f7c92d30e55b516af2d81515667f2080a3e02fc52b51f7af01603a75b511e. 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/USA2P2340972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab81c6c976860e9d38f06cee8ae5efb6b86f42c38629118d53e1bcd677ad0c0. 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/USA2P2320190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510c7c27e1987621c110c93b10d5200ab7e83cbd4590229b07d9bb84549b1e9. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/USA2P2245112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9e408c51e0845221118485a6837bd6a4c4c3482af8dc761129fbe7ddd5c9f. 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/QZS7J2203166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54243c640d4a89193193f06241a4b2ba6f977f3b92e804dd6148d647ca02f565. 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/QZTLA2263276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4340120ea1a92fdb4180db5d5787b3dc46ae563de1dec0d4f33c7b8ab54ea1. 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/QZS7J2108117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44c5eb712ebaf8c4b60bb341634a2f02f953f26aa1e802a49c7340b2c6e6b55. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USDXS2100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5273b6047c7d62edef25ed85fb222803f165d1652c007cfb15ee8ce860da7e45. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USDXS2100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68649dc161b14ce60719705c95819bacf9e60e18b232928655d414bf4ca17b09. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USDXS2100464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ccf4e12bc4da0bfd86c157f15121298387986937267978e297cc960c6f2d15. 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/USDXS2100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1fd324463102ccbd670e5e635cc9ede3588ff42690bd14993aec92bfba4a55. 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/USDXS2100463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4bbbfbd106d160f5f8d591fcc726947c79d7c7d8b994a8d2ddf8dbce912c52. 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/USDXS2010064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25817dd7c9fd0f81238e076ad631836aa996165e6ec724c7dd0a89702bcafdf3. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USA2P2401015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baba197c83e2aa128e104e18be6e7c6263bd3768d4a27dab20de38708b7455c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SE5BU2509555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672f5245c95a72f20141d55bdbf446672fc2fe79f67dce1eafdc1ca89d041120. 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/QZTAS2497713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38c65f45c9819dcb5ec57ad566f198c7e84a7d88586b40f273690677795b839. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZK6L2465732.