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 0x7a0082ba88cc7b6cd4667a458a25d5e7da5624ebf8141c3d99cff8aecd358166. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02acbfa0-a14a-4219-8cb5-799349b65cbe.json and https://artists.proofprofile.net/proofs/artist/02acbfa0-a14a-4219-8cb5-799349b65cbe.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 0xd5317ee4a920f51ff2c2ed8fa304f7d001497512882610a479f45d9455c6d26b. 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/QZ5AB2424638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bbde0f22805dbb0c39df779ef10191e343a0cbd7a1a9fd33f627eb30db718e. 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/QZWFK2366290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd299923a5b4e85edba0a8e12c037e0973b367ef67949a94d0dc5a26823a11b11. 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/QZNWU2396314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a5279922664f3883d06e3c9bd1c13ad45dd40abb5139d9c0ad91bf38a19952. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZHN82380747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f93933a13b8756bc53de1bc227f173b59f3d7fc9fa1b1b2ce76d4de444d9d27. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZDA42365211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c16fddb9d4f99e20f67d3ab6ed09728137cc34b83208b15b18f95eea91571a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHN52260121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dcf8956359e4ff6413c3e6bbad9872f66889da46812b943b0a323e2435a4fb. 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/QZNWT2043061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a0f9dee897b37afaf0cc7066251d9e21aed489e620309cfa40b2b6015b78b2. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6N2009912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda58743394be22fdaead58884c6166c014ad6de54208aebdd195fe5f4f141f. 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/QZES71943927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66de70df27d63b768b2f75c7c6ce44e5fd2e29f99d2db69045ee18bd5cab3e4b. 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/UST8K1848111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a3a8caf43dce105d8299cb9cb38480ea1839eaa7a5157d78858debd4404f8. 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/QZBRF1834854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ced502fba3fb9a523c5ba5a48ba44a95c570099bb3f033a468c4e448da7d74. 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/QZ8LD1767351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8128e3cd24d3942a3b1226515071776be48376ad29c73d6173e3725e35b8d567. 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/QZTVM2377803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7602c69f44637f249d2e53f1a9e04841ad3ea3841f80f14adad64e3f079267a. 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/QZGLM2415295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e458c1067d3a83a7d81980ad81786e68a83363338e749c8cf6b5e57d6aadb9. 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/QZNJW2492364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c659488ba450b56d8ca545953abcea4725c9035e5e48fd128b36746f88912d8. 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/QZNJZ2464840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5317ee4a920f51ff2c2ed8fa304f7d001497512882610a479f45d9455c6d26b. 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/QZ5AB2424638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda8c113359a92de51369729c915719879d02eee2b2311c00967441c69252336. 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/QZMZ92436200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f49bac1c20161a0c5da072a1cb2008d7fce4f34dfeaba89e6704db3c4bec9f. 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/QZ2J21505036.