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 0xdf3e2c4c0ace05fc98867e9a996506d75bd597502c7ed4a0fc0bd56fb9c9cdfb. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9554f68c-331d-4739-93aa-2f87ade7b224.json and https://artists.proofprofile.net/proofs/artist/9554f68c-331d-4739-93aa-2f87ade7b224.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 0x2ca98ae02b68163c097f90046540829d3154fce46699b9794305b7860a5bb337. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL5MF2100890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3845f92e6eef1a8a5c905a816faf8241f454f9768a363b5f8f8894d049bf2f21. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5MF2103079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1bc2c886b38b2f0828ab8dc9e5ec9093071d837d77e1c97df427b91454be5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL5MF2103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d9398b8146c37e5191b53d64901f8b350baff546c0bff1678f9abbc57921e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL5MF2102807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea544dd6f2dfacd59520166518128d42ade10650b1ee7d5a6106e0ff8f9b3d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL5MF2103080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfd290eda3473d5e27746014e4ad71a31f09c6d2c4b51712489b238951c268b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL5MF2103055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b436842eb14d7aa4146030910f78655632c4c7a177224be6fc224b93aec060. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL5MF2103081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee7d1106910cba98c7e40bf1b8dd3753246b1633523347ecf2b1c2ad971f8ec. 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/NL5MF2103883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baeee47551a3739004ac087396462733df0b9bbec01ab5e6ece5157a38adb9d. 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/NL5MF2103856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5159ca246b1b1d5235d201269d9ac9e1f52059b2558bc1d2e539e470d2421000. 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/NL5MF2103664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb82bb72f4acbd4e85a93e9e8d62664d78b270cd5089aeadd1e088d09d3b73e2. 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/NL5MF2103527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5351205adb13b016fa147aba0d740ee2dd6f7c6ef5dbb9da2f08b07aad9868. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/NL5MF2103486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c18131b2a51c820796543df97d47201a4cb71d6e5c1f498dae23e8750bd81. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5MF2103428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680f2e280379f0321793986696e5ca6f4ccd00659ae6fbcb2d36a3230f83df3a. 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/NL5MF2103343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249873fa3b5c8a2ccd36d42aa745c07edf70db7942549905e562e55286aa6473. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5MF2103265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409431ebe4c0dc91504f0ee2013591ae5ce4d4b763347535585dec664988dbc7. 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/NL5MF2103158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8f3ec9b76d3ea7603931ce39276c31789470a2a53d273c110f8f827ab65e0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL5MF2103054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1bc2c886b38b2f0828ab8dc9e5ec9093071d837d77e1c97df427b91454be5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL5MF2103017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9011b9663e2dc507f320dad9cf4bd070cdba6dc5cbe109364fae5cd3a6ab3486. 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/QZHN92484420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00a97f1f37c81d17a83565da29a43c048bfabdd1540d6232229e1fb97f7c555. 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/QZHN62469656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dccc760204c1c7dfd5ac75b2ebbb92358ce5fa4b9778c4f0aed7e92d30095ae. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL5MF2102579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803ea95f30bdc5bc1bc7e59ea8539cc955b9c731cac2a4e1f990f34ba7939cb. 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/NL5MF2102178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960335ccb9a5cde23751dc607374f21eeff4117bb53ba630603fbeae6aaf1e8c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL5MF2101363.