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 0xb8100c26acfd9524c471547b49a48a124925e4e084a45ecdf8b0bb0847c373ad. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f74eeb6-9911-4526-8781-f1297ff01e45.json and https://artists.proofprofile.net/proofs/artist/7f74eeb6-9911-4526-8781-f1297ff01e45.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 0xb680414e9bd708848956971228fc4296cc1d48aabcb1cf49a1857b42bb896edc. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UST8K1654879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b28c085918aea0544610726cf244a48740bb33585df9c7dfdbdd4d9643356e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UST8K1654881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd1eb04fe526b735c0548d10ee896f21c5b21397b0d75329ffbcfada98fad8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UST8K1655447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af0c4f2c4a7ee60229f9a7971cf6554a72b8334d11a207cb75c0c09caa80ea. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/UST8K1655861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f7a3ebcfaaf3e0ee8ea35527bb5b911df33fa17d674884d1acc96bf6389f4f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/UST8K1655899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccec3647185c06943f99b3373b8a252133dcf6665a260eb356398dd1be95b6b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:14Z), 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/UST8K1655900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ce484a69455c9691277275bb3413b40815703c1df2296e1354ae24ee82431. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62293270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e761980f1df0104d50330b366b5379cbc3d7ea6f3f98e0789082dad1cd6bd. 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/QMDA62293266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba71a23a3d8eb0e26269a4ef5e16bd5d64caea47545bba05225c09415e8f888. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62293269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ce484a69455c9691277275bb3413b40815703c1df2296e1354ae24ee82431. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62293270.