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 0x744cb0ff806c7aa8461de00a51a4f2ebba46bce2b883986ad499a84abff23ebd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2069dac-7900-4be2-a1b3-2cafddbeebec.json and https://artists.proofprofile.net/proofs/artist/b2069dac-7900-4be2-a1b3-2cafddbeebec.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 0x49b4e7c1466c10d0b306b13efb60c7d0bcc32ed495fed4931bcda834cf6acb23. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KRMIM2001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf650c6d61927b3639906cef344f75dc748d48afb8ac8e04622dd6b6ea3b8a8. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/KRMIM2001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02557fa6dd8d767779c2184cb06095353baf987891a068788119aaecff0fa2a. 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/KRMIM2001004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2c5f14c5951c14ac99b5e71a17ea4f67b1322ac5fad96ca958377cd9168af. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/KRMIM2011939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391d55e6ded190d3acf0f3ab225bdeaeda0b11141a5770d2cd7c11eef2f05bdc. 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/KRMIM2011941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cec7c504d4616d8bc43f7e12fcc5710f7dea2930eee2e172f352603ed4b8aa. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/KRMIM2100847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a68afd05d9b9ed43c170db456ae18130e17606748fd438da9057db76728bc9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/KRMIM2033598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9999a164fc0c7435168f59c0db071298fedc95254c3c045a9c005fb7f4c79fcf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRMIM2030679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f30e39d2233cea8c23e970d84b364ba9b93a59b74cb090e5a52cf1d08be70f. 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/KRMIM2100858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f2b348bcf7902e23fe2363d3a085da079fccc422992c7e90f4d5358765a42f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/KRMIM2130420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432ddd6f7c86ec1b69912c8f875f3e2de48ae738011f4dfa42d457613fc193a9. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/KRMIM2142207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b76a467f06ac464504121956bff6432d9254397b35243673360c1684263db7e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/KRMIM2273739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfac7489995820ff5b112a2d62884aec84765252462b2037916eac5af2089ac3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/KRNAR2206698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b06a29c941f8461688389c05cde3566f975022b7ed7aaeb9dbb441a5ec23666. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/KRNAR2235508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad9a9cba9159da8fc23ae4fb85fee9560c4c302c122ad8fe9fd134e41c74c3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/KRNAR2235509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a1326d3ccd7d6dea7e51da1d2f4d284a7da71a9aba16f508bb370894919d6. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/KRNAR2235514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd28c24c941add48315d9f03c0a1d00cd3265daa57272d0472b46c1e6aec8d1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/KRMIM2359955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54bf5e9ff4dd87bf3a220d29a5f73f1c66d3c98c76b18823218b34c1422de1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/KRMM02324843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43be1a09201ddeea07626294e2b1a72584c185357ac1497313f2111a5956c293. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/KRMIM2441828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa611f9aaea8a021c07d582e172cb67850b52aa72e16974ab5c8155c999ea7bb3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRMIM2449712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257c3a219ecb4df3a2517b8029e0d8483ac8b743be47e1ac745476affcde196. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/KRMIM2481127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a4ab3c4b85dace3f0378d330eac1862461bf61bef1daacef5cd6c6308abf45. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRMIM2502310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddf843f8f46b150ecd684d2e06c5a7cbd891741383e33f963645675cbff2784. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZEKE2016450.