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 0x3885d99e4435e11aab3557f171a379eb471913e7abdf95b2467ae57a949b0b21. 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/c7009f39-5117-4433-bd86-9e7f303cfeef.json and https://artists.proofprofile.net/proofs/artist/c7009f39-5117-4433-bd86-9e7f303cfeef.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 0xeba0c4908ba2bc983f30c2bd42021cc3cdbd6b1656bea7f6a6ce43f30fbe4b58. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USNA19710241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35364ea37718724551ea408b9fc5fd96c9d752ec2af4b07a2a510431979feada. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:43Z), 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/USNA19710242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe795b8e9f78a6d37f3ef43cf5b2080bec297dd4c93e0b130a55f6ec71bb2ab8. 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/USNA19710244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83b954c25a3cbf6ce74717c3df9e0eef6f2487baa34435e9bbe2ef45229a3db. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:01Z), 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/USNA19710246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9898d77d1dd66664da05f27d074222504de2b4daef27ac714f4f6ed3e8a7df8f. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:23:54Z), 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/USNA19710247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2139d4754c1cd37fff8c7d7ae4564edc358deec11c5fc7d141908acb28dd57. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:24:28Z), 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/USNA19710248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c51687498c6037bb594bd1f6092e43dfe7584d552c6eed1d039792242fe0c1. 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/USNA19815373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c5ef4348230742ad40f84fc92a132f03a44d34b172c103464a3102a0b08a9f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USNA19815374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d24437cff0aacb6261f9b227f73b21fa50da20cb9e193bc1ba764afcd2d2f. 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/USNA19815375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6068eb6c484575534790c40d4bd976e902641ad7b703c8ded0cd895f7730078e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USNA19815376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528d60e863bbedf8aa34480daeb7644c9c80a4b82ef9d3836b4c246320c53c08. 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/USNA19815377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8681d0062169523ae227a3f3d44ed86504091b2eed68935c4d39f0469afb1d7a. 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/USNA19815378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1fbc4995876938ad3bd6e273dd50f00f08050942194d26839baba558324cd6. 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/USNA19815379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbecf2c2f5599f866e790e4b5deb625990cd016fc1ea5e2bdb7af52526e87779. 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/USNA19815380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb689d3bab28b36cd30688cd7fa28a11e822bdcf8ee1769347a6e1f817c9e34d4. 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/USNA19815381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb4a0c541363db3921a7f3d190a9181fbb55062e901cd653cb24b370e275a4d. 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/USNA19815383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92126d51780c589a2f69d75330974d1d812280a03cdfe2b95d7bd2da5b75f64. 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/USNA10017097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7375f215365958e4ea591810b5aa7cbe6a5d2ef154165ee6f324e75906225c54. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USNA10017093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae2baa58660ad5550a04ae2a34fda285b737d528d8437f5c84af15e7cb79f4. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USNA10017094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868cdbb122c066a6ee56e5f1fcfd97806138423cf1b57e410153aa32ba619271. 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/USNA10017098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906dbc9eb1f3707f3eaa418dcffdcbd62e8b1b59eee83338c27f482df449ab4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USNA10420233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac34ee2677ccfc77c493ba9d7cc1409a6ec6ca0400b7dc739ea7efe11fd7ee0. 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/USNA10420234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0197284b73a8ccd4419172e3c4b4854f0295c258a38e30be53d696cd292f283. 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/USNA10420238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcc5196a3ed0a7a5eaf775f23302a793308addf4d86710159ffa42f8e2304c8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USNA10420241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76622e74d20c1dad38a57a9dcc47008c450c52e62a484db711b12c7f7f5fe0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:43:06Z), 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/USNA10420240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716bcb9274c6ac9660150609e380672aa8a6dbb2060947e7cb42c3814047dda9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:37Z), 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/USNA10420239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126d4c5282f17db9d5c773cfe58f7562db4687d32a46de636fa1582a61e51104. 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/QZK6J2541879.