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 0x27ad04f071f9c9498b26b530983b547c33bfb7648b2c0d49d1ce5b2ee819ce7a. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25e8f3cd-230f-4e00-ae8a-7dcccc91c633.json and https://artists.proofprofile.net/proofs/artist/25e8f3cd-230f-4e00-ae8a-7dcccc91c633.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 0xe052b2aaa1f6460f219879f372b89427a28cc4947af9226811733bd38738349c. 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/UK7GS1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34aac9ecebd9cf7d72ff0a17e732bade756a80aac93f837487c99375519fcc0. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/GBLFP1841725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6a5a6bf8836f2617b2185c7bdd85fa51bb289f17b8de24aba7ef8ca4531a20. 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/GBLFP1841726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea50de764d729f1a3cedef19c9a9166e215b43bf1da5e707805f0def79d9e31. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBLFP1841729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3a0dfccf6c5a6aebecb93c71c2f499ea70c452f9bf4cd5b1a68e819b618b2f. 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/GBLFP1841730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5f90369b4bda83bd23eb1498f041f78986511cabc40875bb9f1a9fde19a3c4. 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/GBLFP1841732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c46203b851222e90e3e195b9b51ef7c91174e80535b0b8927e699ada1f9a4e. 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/GBLFP1841733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1991bdf7b7158bde09a1b7a78e6c78249e781aef9dc3389cc722d18eaada22e9. 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/GBLFP1841734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a26f31a084bf4d602cf6c9d9e5e1a6cc1388d30bcf192104d30090671b26e. 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/GBLFP1841736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b71a2f884d52fa3a54d797bb1099ba7bd1b285a5ac461e1862fa481e2e8df. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLFP1841738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0393510e0576a9610b6c1da80d6f05e8ea7f72939479c17787082110423aaa38. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLFP1841741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02d42d8fc1fa15c7cf90d98eece003c0e743775e51fac74d63e0b9d397b032b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLFP1841743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970a12709359efa64e9f7c3cf5872a4b47618927574d89fe20055c5fda97e880. 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/UKXN22471685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bee4a70ff218755159711b4da394dfe96764cdeeb3d8e74c6b12d65648364f. 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/GX3Q92400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90b58ba561889ad6f92b52cc74eb1c194ae100f6c70ffc33f02759672a288b5. 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/QZWFR2368910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1ab84b126dada7651ee9b56a1488a1006a90ec5ebf9ba332aab2a8fd92627c. 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/TCAHL2364600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091130a4faa7cdbae77637b022f61eb2516fdf069fadf829eb7a118fed36f631. 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/TCAHK2363537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7029c2502a86d8588c068c8bec3f255c80b3244b022144bde25d42f540dc0713. 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/TCAHH2333020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d9deface4289aa10bebbd43ce96ac2570c06a8e2e7ddcfee7353d53cd38b3b. 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/TCAHD2334845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058a0d747f55452f04e527784de69e381a57f7e424ae769e8c00740c6ba035b. 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/TCADL1850013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d113b414ae3e815efc81d0bf312c935a8bd5753903e73156f48fa1f316d550. 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/TCADB1753030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9723e690b7020803e1833353c0d671809ec115e135ad8b4901c2421aa517d591. 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/TCACZ1734420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c57e93cdf06ce114f33ee65bfdcc7fe8f686a342107294d588c19e641c88cda. 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/GBMA22454281.