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 0x9ac478de3241bbd20606318ff4de6c75752d90a5fc5f08febbadcef0ccfe48dd. 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/e276fcb4-81ee-431f-b126-23cd8315db20.json and https://artists.proofprofile.net/proofs/artist/e276fcb4-81ee-431f-b126-23cd8315db20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xd2626f96cc5d1ff2bd003d7e5666bc7beaf90e8477be0234d1ade859efb14bb6. 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/BXDGK1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5294e683a50c89d7c38047d974c935641e79d86cdb0155780b4df06917105a67. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:40:51Z), 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/BXDGK1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66a8f7333cabf0033a61ff0ed517d35dd0f7bd8e6cc5d464b231cf2ff1f09e8. 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/BXDGK1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b62b7edea436a95a2f9ecfd4d969e6f118821414b75193c8a45ef6df2683cf. 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/BXDGK1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50880bac54981e44614564a1f687da636908221b3756d7b0cf78c513ab287e5a. 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/BXDGK1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ee19effca637b78a1b43ade32f3bbfb2abb22901805f36c946949fb38b094a. 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/BXDGK1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc149aa220728eed73f9d01f1ca1f9ff41575cea695658f529d577909610c2d. 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/BXDGK1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d93a8ca1f0da00df94323c267a2a49be96e58f66f69700bb3fe1ac421b6006. 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/BXDGK1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa37d7d1e2d89c2e5644a744717a02bf57fee6e6fbdc3dee10c229c1ce064ec. 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/BXDGK1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7badafb49704cb3e00a7a73f7a039dd70adb0e197beaed83dc54c30454b3ea. 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/BXDGK1600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f3bd58637c751c24d7557009323d2ef642b15ddc41e1d530e4569e7f4aff83. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXDGK1600025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a00eb4b81ef06d8ba2c5141389647da3048624245daf54529ae49439db7a83. 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/BXDGK1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890655eed39ef20539c4407b610d503861932eddd9caea80a6801852474bd665. 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/BXDGK1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a612451c32830618050245cf23e3019d3017f22a990c05da0c5e7b0bc94da13. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXDGK1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6445f57b7a01fa7b9453f7d7d42496e12000880c394f53ce43f6b68bde3cd5. 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/BXDGK1600031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2402a2c9fa5517c8eb9a506a6eb5422ecedc8e7955293b9f8ad635780093ec36. 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/BXDGK1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6e409c27635e074db39d0293fe998df2abe630cab63f699f1ebd88673a4e0f. 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/BXDGK1600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8531a37e8614894627e4ff449d5b8e322c433dc12072e332a0968b56dfc6f. 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/BXDGK1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6794759d72d4d26b7ff049c5b947f110e65d98b2261999b96808d0998e6ba26. 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/BXDGK1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e492d4c11be5c5f5689c0854b3496014665e209acc8561a9c44dffe31d082f0. 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/BXDGK1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeb1bec3add903f7112432928277e7782ebdc57fa3375a71f57adb9c5d44c99. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/BXDGK1800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4943248fecc56e0065c6d1405c8dc6fd2079bc42325482ab742452c6ee69d8f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BXDGK2500002.