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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341723746d019ce756ad180ee6ea72c0ec2054adf93c84fbadcdfcfdefafffd8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7cbb6ae-2529-4327-86ac-6c4f3e9a93b8.json and https://artists.proofprofile.net/proofs/artist/e7cbb6ae-2529-4327-86ac-6c4f3e9a93b8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d5e58ff36761d3f30f16a49c2d33ec94e704a12caddc63494260c8631505c9. 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/QZ4JJ1681469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b360fc23f3215648ad467cb86ffdfdbf6b0ee1e08e4b0f7629529211834a33e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ4JJ1681470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6ca64f26fa8d10cad0336c8e7b52fa13d440260ce3f0968c22815f1abd8ecc. 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/QZ4JJ1681471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf54f0df76faf6835cb007dc5b027ebd5638c9fd70845a1be43b063473812e1c. 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/QZ4JJ1681472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3ce9ad9f2834660bb44306d9ceb0530c90e283e3cb024a2701639130ef718c. 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/QZ4JJ1681473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f27456ac77ac919eb311dc5554631899be4f878922e41ca6b5bf860412a7d3. 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/QZ4JJ1681474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b42ec3742f4af320c4d2b5281f31a02ef63b72d5cc619f07237b67323c5c883. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ4JJ1681475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7477c420c08276be88694af499bda47eba8596940fecd843126ef28df7e6720. 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/QZQAY2409130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5016cb5c1af346623f2c91a8ca0ad730417ef06076913a16a7b9f02c9f3c4cf2. 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/QZQAY2456033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e2a4d446edbb24af20a4c814a2e35a6b539aec1cf3c8d892b5411a8e5cffe. 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/QZQAY2353047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8899afce835484cb4f8851c4239b8397edca8c4bd702190de694966705bb05. 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/QZHN81981077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af8b09b0f5a123cc20d8569809ee64bbbe98eac554ccc7abf5d5e855903bc3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN81981078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb01e21c1e612286e08a0e90b3e6d80c9af831bf3f0297f338fcc49612dfaf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN81981079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49801b0716c75319b4f892394f7c318f30ab6dcdefa92f6d9dc13b6c746f795f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN81981080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee3e1bc116d9a805214913a427f80efdc2688e0aa5c3423ca28f98a26223ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN81981081.