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 0x1444e6a867902a1d768e1ffb0577a3d29f476b7edf344714c53192b0995210b8. 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/fac119cc-a9b7-4bae-8f0d-88f11ac64c85.json and https://artists.proofprofile.net/proofs/artist/fac119cc-a9b7-4bae-8f0d-88f11ac64c85.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 0xd3d68ca60bdb35dfa16ee73591a349ff16759cc76ddf047461523c51d3b9e36b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:04:07Z), 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/CAQ8S1617071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabce7a4ce1689f26d3c70c4372c820c43a533d007d2f432941dcf1262732379e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1618018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7c1d27da5092123d727355f90828e964a865e2cc143e099e075dd06f1a1fa3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/CAQ8S1619683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1013682d1f5b802766c30ff74759f20476f82c821a26e7c73c491bee9e878018. 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/CAQ8S1620399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922f5e0724f006b10e2157e22b2f95689b706640324dd8d7d4ef28b34b162eff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAQ8S1620451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4742e9306715be5f9c0db0a3d57136326e726b10773cc110f9e453876c5c4a39. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CAQ8S1620846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe992e17fa44a6b671a023fc4b54026f75b14c8e309d82bb29a25a65ed4c3a7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/CAQ8S1621274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afd98f1c270a7c87fd05646c6860261d29dab6179f21c9d48754f8d46c67724. 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/CAQ8S1621658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada56c5775a4cd523d60a09864c4ebcec35c32dbc7d2b961e9929144957e6721. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/CAQ8S1621778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd552bbc4dae8a760060e8402fa038153796df43e4d3d50522d29442b8869e19a. 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/CAQ8S1621843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe8215fa124b5058446cf32dc4a11bd59fd740b236734538e97d1e34d0e493b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAQ8S1622078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cbe8a0e9ad666c2237e958335289cbf5a62d0ebec245dcfdfe995e8f1c759c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CAQ8S1622805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b8bc3343e31a8bee5439d6f29d176cff74e9495da94d0b2fa7218a8098dae2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAQ8S1623094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e03f9691afd09b97155d67d6d63fee887bce25c4633ce6003718ed433871c20. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:30:03Z), 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/CAQ8S1623118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa259f23f2fb39e1d0c3efb2a7f3b66b815106c81650c44656ec037698f2e8a79. 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/CAQ8S1623619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafbd908898a5f082b98315b278aafffb4e449b786d91f3d5ca245c01373dc9b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1624753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b26bf243442d699a63c05263cc37ee5e4a748bc01b9794fa7efdbf3418f78a3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CAQ8S1625359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd9ba08e9b58027f5b36d67b92e870501ed31b8966ee9243ad35cccadb040ec. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/CAQ8S1625435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc556f2680165a7c3943cb0256da3684498e2b8462d335ff841bb3a4d63f1cb9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAQ8S1625573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8748862b8cc70b892c47adddd3f23afeb0e6026bbd7d8fd988ba575b751964. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CAQ8S1628705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2361a4b784615ec7bdd66397f3dca971fa1003c1a16e25449dbcf11ca679e5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:45:40Z), 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/CAQ8S1630371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166ec67e01e9db702e1a2e17a9be3ab7060e085e4069113adf671a2b2b1286e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAQ8S1631719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7587688da5e72faed28cd9cf898897ad86c1f8389dd514e0eadcde92c1d3b5f9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAQ8S1632277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ca5db41f39af37ee660691ab6c5e98a4530744e9abe3ba321c3cf271751e76. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/CAQ8S1636209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069bd429889e2a5745684fe250972ea817d74d294ce99cfbef462da686d1ffad. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:03:04Z), 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/CAQ8S1632906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1686b67413b8514e342f0b0b6357a1efd3d38404c0ced65dbb68317e9778d14b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAQ8S1637805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2cbce23e468c789756964c5031fa26abd508d9f6abca620f5bd86fd84862d9. 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/CAQ8S1639750.