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 0x6bf03acfcff3c294287501e31058eb57b40d82eb4e7235db70902eecde9d98e4. 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/9c2794a3-1a23-4c54-ac67-5e8a8eca8bf5.json and https://artists.proofprofile.net/proofs/artist/9c2794a3-1a23-4c54-ac67-5e8a8eca8bf5.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 0x7f5b21f7f185a03b77e6866e523b41fbdab6f1372bf3bc83643b5c1b9739a393. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHNB2339284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf750779f34c3537c4cf7c0df39cea73ab4de86d75edd2a8ecd38f14bc14821e8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC2312975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae1b9e35f2b164bc2eb35383ee99d4b938af303b4f8abd474e064662150d047. 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/QZNWV2345044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e6cd99c25580446362aca040499f43bb3b7f76094b820f6f897a9697b2b61a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWV2345045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6185b6d0c96eea34a246f96a5d31be27bf0036da90f075c3f2497c96ff5e731e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWV2345047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48386120b152399fbff125a4a3f72bb5167f1e9e2bf41be0c0fd7985c24273dd. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWV2345048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c401837bd53c9b1afc4bed5f041fdd785998ef55658b815890f8ac6b93df5aa. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZNWV2345050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd821b9a5bd4dcf02d2af6b3b6d3d6d93485f4626eee090f8f80538e9b33a10. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:42:45Z), 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/QZNWV2345051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e447163cb723b7ffdf21756564deaad2c1ba8edac5b1c89f53b22c3a1021c1b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZNWV2345052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd296f79c929061d4cbd2a843eb9aafd6d5839aa4b4adff19e46b88aa65d44c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWV2345053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf825a6828ba9e83419b060439c95a49a6312cb45a8aef01db8f443a468c3b4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWV2345054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba137a943006477e42e64e90ea218f9a31cd0ca09cbc260b2ca139809873ffb6. 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/QZNWV2345055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7da4d1c090b08b23d156368dc4bb00171c9ca00da6a664be373f4f6d30753f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNWV2345057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6e0274c6e4d4dc7527bf11c89dc1ec57a1a4aa8e6ad5ccf74f83177c22e45. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWV2345058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e876b28ecbb9c01845db2d890906ed67c2165d09611afcc13618d77aa5926. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB72326224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71ad1763133890bd347a5393a24132b8ea83f2bea968c6b9e528f0771d78d05. 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/QZWFP2302419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07836034e659b4bf23a09a093d11f4ba4f279ce9e3ee0ace59a21c1710bb1bba. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZWFP2302420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f042c411f4a20e9aee4c9951b48d7043fde0944afb3b6cb1b79c0dfbf9378bb. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZWFP2302421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707bd198a4913b24e3c8805bc3fc482648c36235cdada92a22a7b1f813a7ad9. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:18Z), 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/QZWFP2302423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6934c0cc55f81fde372f7784c9816369ff7c02be4f37c5ec9b7fe46bef2ccb4d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:07:30Z), 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/QZWFP2302424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e876b28ecbb9c01845db2d890906ed67c2165d09611afcc13618d77aa5926. 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/QZTB72326224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc033e60f44c1291f9d6d6d0ccf2d8b1e8158504cb3908e6c91a972cfe15248f5. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:36:30Z), 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/QZK6P2429547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd76e76942b47999407665c8eee1e70eefc86fc800bb4192f8045a2ef1d2a86. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNMV2415178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda6041e1082978b8ac4ea41765d98b292aa30fb7b6134ec95b3df9461660715. 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/QZJG52590383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd792aa654cbb4bbf8fbe1bce0b0e993d320eacb591ae5a0bf427f7c576ac8c8a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZJG52590384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900edfa7cc9c30d5de2388227deec41c060ac94dcf538612d4ee27ea9df3b8e2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZJG52590385.