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 0x5f7ea318cc822354b37aede32e595c83bc38d70214aa6c61b52b39ded34b8039. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7215c443-c260-4ef1-9277-d1de156caaad.json and https://artists.proofprofile.net/proofs/artist/7215c443-c260-4ef1-9277-d1de156caaad.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 0x406b4d37ea2aefb0a84e13335c74ee2e3f3a78e2ceb7f4bb15235393dc29dd22. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/KRD461900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfbf650a3c3f7176f5ccba88ca108970264f241f7b10ffd7fb6d14013bbd875. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/KRD461900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0040c3913b2c058b82b6b6c61e834f0d6a44ea4c289bc65ecfa05c08b1fb279a. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/KRF452000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46f7cd28be62ad4e1ba1d790f2de251fd5d07ac42067fd86cc2957157aa8c1e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/KRF452000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a288433c1aa6c34f5366ce9a63a8902dd283d3f5360f8f107d005cc9cf58d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/KRA0R2000724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6d1d6f56d1b6bbafb59357d843921cfa1dd87d67db64ed098310ba5c828e6e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/KRA0R2000722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6772f97190fcb9b3122160d8ecd42599255971eb6a17d8ec9972b00577de4655. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/KRA0R2100529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6950f6d614f3c1ecfa38451f5dbe9baea40f48960ac2e13ebc1a575146295cf9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/KRA0R2200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3e0fc83fcdab1d9fa0a05c66927a4a6b83e3257904bef137da0413e9e818f8. 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/KRA0R2200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314047c691b0006c660465a640e68ce1b22130f2ea2679bf379511063b0cc802. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRA0R2201274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c41c4a589c15de67f2686e4ab58dfc374a62057127b977f86c9c8c98b2c0690. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KSA012239758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057de02406061f56d02a02a7cf8022e4a4d44cca76c28c0b9ce2ec13e0caa9e6. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ZZA0P2311998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdb5ff215b96badbdd6e23aa9c5ba7d167967c6d90805f3651ae7ea9ef14575. 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/ZZA0P2402039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388a8cff54fc57e8937db5c057b7e95081e902c4624933b4b437e9001d5c96c3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ZZA0P2404386.