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 0x77105900f90dfbbcb0c487e59e2185fc9e2b7875c6c1d98bf149c22e0190b4c7. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d1e9bb0-ba8c-4bfd-86ff-a8d450edd0b9.json and https://artists.proofprofile.net/proofs/artist/3d1e9bb0-ba8c-4bfd-86ff-a8d450edd0b9.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 0xfba756383b8c06986d956be81e223d80d5a776ecc47b7f17c125c7111755ff7c. 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/KRMIM2183447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5c9b65f44505ebcee21f64ca006522085d3ac55ed2118b3eb5aa601213bc82. 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/KRMIM2183448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16235c46f041c5475526c2a6bf586abe26aec76618cdb1cea029c62f3e434b93. 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/KRMIM2183449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35ea92f37905706c0db12a8be47e44690c85d38cbec75dc4109168032b72667. 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/KRMIM2183450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51c8251a03d5861dfd60197f6a62c9dc7a5ca3b1b2f27c7db6ffa3d6bf6d70. 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/KRMIM2183451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2629ce640cb4310ee5ce2a1fd0092176b86d61524045183e58d64320b29e6028. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/KRMIM2183452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafc15a9364d34b02cf31be069844ecc7af20ae976fb23fa734a300f62201037. 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/KRMIM2183453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2e94ad623458a9d05eab73d3fbf69b2cbbfd01ad09f4760079e5f6b0fcd26. 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/KRMIM2183454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f20308c08a25cf57c9419bb1409a987800e6c998f1ab05a0c69831335696e04. 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/KRMIM2183455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd7884618a86a6ef2bcac18d1c8c511e99a7f90705114f4f7983abfd3a684d9. 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/KRMIM2183456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90e53ee7781694c3f02efc1a7276e9110fc887dd7da6877502ed4c7aac49664. 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/KRMIM2183457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c660cd340cfc7fc55a69906422b2fa2b1e771dfcbcffde665e82c515e46c1. 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/KRMIM2181113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0baba2f22e4689228d6d9498a477ed2658c82c4d5e9c50fe8daf81dfe2a5c4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/KRMIM2181114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9e9df854e96d51d280972a0d1477e9832c581fb38b1adf0911ca0838d62b60. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/KRMIM2181115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd874769052314a96b3229a83b925f068d9933888865961f3b7a0e7c9798b61c8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRMIM2181116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00222a745832730604bc8a8f28642f24ccb7e96e8da39cd86d14711e062b2e65. 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/KRMIM2181117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c7f8adcfd55bed211cc425732746e36801ada1cc1ea9845433beb9784c056b. 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/KRMIM2181119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f5a57495a94aabcecab7bb2fff918fb9c4cedd92ffa248672081ec6dacc16. 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/KRMIM2181120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a35c20d8ea6cf7789bde01f91d94a40ea07ee6731281bd6cc2894a42393a8ea. 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/KRMIM2181121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ca8fdb9e4abca9b0863f2938aa1f769084a13ac9400ca2bb44e8e626d7a8fe. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRMIM2181122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb733864c9788dad678f2ba8292ce8e56c4be8f1671cc0e7e6b8329bbe23c960f. 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/KRMIM2181123.