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 0x3de6759247d175b4b6801ed55b864137ca1ec21ebac408f992bef28638514eeb. 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/7e10ff12-4b0a-40c3-bfef-ccc3924a8cd4.json and https://artists.proofprofile.net/proofs/artist/7e10ff12-4b0a-40c3-bfef-ccc3924a8cd4.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 0xd89503b11123517e0df037a0a6e8ce2857b8eb5ab6b8c25b2e53f0db1183a926. 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/NOPM72201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3aebe6aa2f1b03be7d2b789d7773db79f4eb7bd8be031057967ec84ff6e265. 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/NO2DY2300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6004f8df87a78052ec90f3e4a00456caf828897e012b5bd441dcdff184079b55. 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/NO2DY2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f87fcd3c5ba936c23b5f37159da5863ec2de2d045ba1dc6540dbdbe29d904. 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/NO2DY2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90c0303af4276edbf7f1af7d04b875e841dd7ede814cd18efd515bbb819b10. 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/NO2DY2200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ef667076943b7ed71688c575e297a854697221a6b244ee2d91824a594a429b. 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/NO2DY2200182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0a112d472e1abf2d3044921b3775059744dae7759bca84fc543d878eb803d1. 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/NO2DY2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f6f2b48acf278be4c8f8700bbf3074746f9b98af4245d5797fcabf660ceb19. 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/NO2DY2200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc6750db0c299c3d858183625600326287eb60d176693a79aac41a39ee8a625. 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/NO2DY2200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322c1645a7dc1a71d15d2cf4cc51a740feb42bc0e0a4828f37ebd98e1504625. 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/NO2DY2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b209c636cf38883bf5fd29905c9ba880e352474438ca8dfb17898a23c742212. 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/QZES82128663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00296a27ea16e6312fd81c844e409c186d17e9cd43f584348150e0729aa10fc7. 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/QZNWS2165168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20348cc6eab5752a4e4b1e0afd4b8df11a7199fa6820f1db7f64a0d6417a1215. 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/NO2DY2200326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28bc181622bfd311cda88b5cf3f1a89e47d2d12e691d9ccf7822d6627522da9. 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/QZNWV2045270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498bfd5ad64a045e57c6a3446e9bee811153348f6a13a0d9bc8bd6b544490bea. 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/QZFYX2095453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d55f9d57a972ccf3862a845a8bde69dbce97a738ce2bcb02ecc801747fe107. 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/QZK6Q1990142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a76c9c2ac5878b8b30d9d5e375bf563e373f7a563e1468657b08e553d95f952. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES51999051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71df1cc069396612d45e8d1fea956f2125a129fadb54a40fd996f0af5c29e125. 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/SEYOK1851559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb590b2b3fc609cdfd06bf15a1be50d9714aa477d2727822ecdd0556cfe8e7. 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/TCADP1835289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db4d9928a846fca820c5b462f85804f503e6f8be5e7bfce061d2391f02a6b3. 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/TCADP1835253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0c7cc96f4498c6e826b4881f59ce52917532fb0649690a76ce95bbcd3b30bf. 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/TCADP1832616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4f2af14db1c27442e258bdddc123450d26afca8f64655a081567794117e5b1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCADO1896268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc569e3ec72ec567fe959b2213357c3110c26942ec81da65163659df68ba315. 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/SEYOK1776098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713fa4f4d6f6877f09d00bfa40377243fdfe7235d019f7b5038db923b5f386b4. 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/TCADI1751117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221adbf6c75d406eede8146958f5faa0486e6304cb5c8ecbfe3f0f74966e3bb6. 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/US38Y2536369.