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 0xc12d6bce0a7507d88ae4bd4b99a76d91f5c5527c14453ec9f19588b6ba7f0dc2. 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/98d88b01-cd62-4bb3-aa0f-b4dba5f2c5dc.json and https://artists.proofprofile.net/proofs/artist/98d88b01-cd62-4bb3-aa0f-b4dba5f2c5dc.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 0x22adfcabe9f4a8542391bdb328edde1f26a6ca5880c6d1a69f6a417ff7af1aac. 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/QZES82111494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93ee19e5e548453cfe1b82cb0745c098d49507909554b03d61e573fde53cc1e. 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/QZES82111495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8290be3860122dee5ffc0d0b193a16c9ace527d99d07a7b0a639eb6185e3f7. 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/QZES82111496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535e288f5be5f82bc96af17e823c3505f583ccc1ee48ccbf6ded97d0dc7f3e0c. 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/QZES82111497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311e9b9fd98ef5e6cd19c42fe4feeb4a3351b09720af2269cd63b5f73a5c887. 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/QZES82111498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef04ba620dbbfbd96c3ca4871f20085765e15e4fccb44be1dc8c1bd3ff78b30. 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/QZES82111499.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b85a76c9f4859ea947c0f60b383cf0ed7ef5afef9f32493b1c00490814325. 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/QZES82111500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dec2fbd17ed63e6ad99f1856399eaffce32e755ae09e109e8e2ffa84d8c9164. 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/QZES82111501.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449e53b4e866dfc5d2b1210fc2b6da5b7e2b493701f8ca2668c5385cc215e5a3. 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/QZES82111502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3a0bcabc06bfe14b4760b75d30e7ef9f538e13106712a8c1694d518bb9044e. 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/QZES82111503.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74f2a6d6cef97c355ff9836a57e754b8391a3981f56f6288d1e913d9b2105a. 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/QZES82111504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd844f7647ca564fc38f05ac3f5149cf76ee4bd10e30f8259f3c4e96bcd57c7. 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/QZES82111505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a006d053ebe496e657744d6993689cf91180c277313a927e03e776737cfd79. 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/QZES82111506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8c722c45d3d3a963ae9ac963122de6c32e9312981194902cf3d393f114d27a. 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/QZES82111507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cd9c493240f49d0567e4ef3baba748cba9ac3cf936a93af3b9365c8b6e96dd. 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/QZES82111508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558ced59f80d51606838a8bb55884d17765d345ca2200855ffb5ba1882abf437. 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/QZES82111509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5191c8a7a7d1ad4f623e75233f9728fcb1494e5e2bc2036a9b9c3b319c5dc7d8. 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/QZK6P2312036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aaf3131368754e57a03b6ef0b0b59f898f18c706706a83b4910f729d22dcad. 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/QZK6P2312037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b7f388460ee127d75f41097e134ca23aa27b85b0cd721881c892af5521c205. 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/QZK6P2312038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06abb0c699abfe0111f71927c7e72de6e0d58eb7ee6656300e1c05c307c746d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6P2312039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73498ea48d49753be1b570baedf0a497ad01eb1a529ba8b842d0cc10da7e01. 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/QZK6P2312040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a45fce87df3cfe8462115273fff560aaaa33b404ea5428571c5e82bc0b2680. 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/QZK6P2312041.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bd72c5b40ccc59938426706719b4f3e4f9fc6859e395217565667e5a22cc65. 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/QZK6P2312042.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2060259f65908c1e6d2f5ee0c9aeb5c06def00b94df6524dbfd80b18595d93b8. 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/QZK6P2312043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a823f4a072e43b873004064f381b53af44703cee5da216a2e4cb71b406f0ca. 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/QZK6P2312044.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc1daa0933a3549fc44a6d9616db0b38f2b8baa23968c972ea1624bd590a86. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZK6P2312045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4cfd5ebf440d51fd7a53c132eee9289c93a2a4eba54ef4cdda38a8fcaca460. 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/QZK6P2312046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eefef1a1b49bd286c96d5e785b9f83b9c4f57f1a2a77abdbef5b8e5292d2e5b. 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/QZWFJ2419294.