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 0x83631c54a67ac9e3ab61ed4c39df4634bf0e67b6a87a85cab97ca4973329007a. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec119ff1cfa462013faa970cbe3d57f5baaf5563a295d9085de402c22d383e. 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/USA2P2301294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4510c7c27e1987621c110c93b10d5200ab7e83cbd4590229b07d9bb84549b1e9. 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/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 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 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/USA2P2301290.
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 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/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 957122 (2026-07-08T03:39:04Z), 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 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 (2026-07-16T23:26:11Z), 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 0x212d29c5c6179f85fdf541dda95a6c9dfbff4396e583f3dbc805bddd6e23edfb. 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/QZS7J2239073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a9e408c51e0845221118485a6837bd6a4c4c3482af8dc761129fbe7ddd5c9f. 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/QZS7J2203166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54243c640d4a89193193f06241a4b2ba6f977f3b92e804dd6148d647ca02f565. 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/QZTLA2263276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4340120ea1a92fdb4180db5d5787b3dc46ae563de1dec0d4f33c7b8ab54ea1. 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/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 0x45ccf4e12bc4da0bfd86c157f15121298387986937267978e297cc960c6f2d15. 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/USDXS2100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1fd324463102ccbd670e5e635cc9ede3588ff42690bd14993aec92bfba4a55. 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/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 0x672f5245c95a72f20141d55bdbf446672fc2fe79f67dce1eafdc1ca89d041120. 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/QZTAS2497713.