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 0xdee95a153cdfa1c147689362f899d383fe9a481900b85a835bfdf41d61c20f8a. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/638fc91e-bde1-4901-a6bd-0bad7e687ccf.json and https://artists.proofprofile.net/proofs/artist/638fc91e-bde1-4901-a6bd-0bad7e687ccf.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 0xba8957e074be0265f308c453ffc298f839c81a87f727dfd49c5193cd4b15d2ee. 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/NOKTZ2402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602be689a05a3e6daf41a68a791cc9f7e91a23f030eda46a2e89208e85f9f2e7. 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/NOKTZ2402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd843a60b7d5f5738536aea1d2369175c73ae339919a94c26dec23d7bb308b07c. 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/NOKTZ2402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c381970cc1b2509d6a8d45fd0d25170fb17e3460ab8d02e02c61de698921ce. 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/NOKTZ2402090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b745c6c297cb4b65e103fdcebe2933fe7e4a9e8032da5b1700520105c7a3c1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NOKTZ2402010.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423f022544be7a3c5fc72a5f46e0800ae20828d3105319d6ffac767856ff0e57. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NOKTZ2402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1edd4996e3283e75965afdd0f9663ac540b8e13c63bfa028374787f59410b9a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOKTZ2402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a66e682462328b11d35cd67e2af655c38bbe44587f14fc7762000ace21bf1b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOKTZ2402060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4864418cd1b8eb5150936fb8befb1528e264d66e70c96731c24a9007b4eed0ba. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NOKTZ2402070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4cbb0ecf73dde740c3f1ff5a21ff92f1cbbb787b3b626ef8354fc7cdc1f44e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NOKTZ2402100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9b78c50478c54cbb18a2089985297431028d329142a09e46a0e4c9c2777bca. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NOKTZ2402110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3088a7a2781fc5eeec2286b3dcc65325ff495986c507aef13d097101beab0574. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NOKTZ2402120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7d705c1bf874c30ee7dfd9c0ea753a1de68e0d7d5261e6471c75671c9e209. 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/USA2P2027391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ee3bfb7f33c40918eb2a5d74ffc3c9f316b9398da5d17fe47b295b710777ec. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P2027392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb121fb7e3ad774f1e11e2b0cfbeda8cd53f9a764662660d9d37f3d418856ea09. 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/USA2P2027393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4af13dbba30aaced90ab8f49d8f39efa581c9f9d7e74ecea8e75a125bab2fd. 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/USA2P2027395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a76e52dcf70d5f4da68de03fc9ca70d9ccda2d026fd53694ad3e612971c64f0. 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/USA2P2027397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e30dd755f275bca6d3a2e9c86e6e90f1784cb1fb1ee7909a25294a6146c4ee. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2P2027394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67613284b990b0584c0d2bf2a0a4702661f21dc88c5870871615c39f8d5cada3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USA2P2027396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e0b5de3e9b866541d989a48e3819a8f7b320c6e36bd2dafc639dfe27e7001. 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/SEYOK1530885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2eb06d7a024648ea45bf0cdee6867486d5f3a7ed74b14908ca83979cd3a4a. 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/SEYOK1530887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a6bd0f12de8115d2537ca185af166d08f66c8f56d1c9663eb7d8ee2fe7b5b. 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/SEYOK1530892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7bbe7610c891c00fec8ba32572159847252daea190e2a0f860c8ef0546cd9e. 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/SEYOK1530895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccd8879e1ebcafbd2d0c0ea587229ce3d47706b50cf27c9002c81299336c4e8. 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/SEYOK1530896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f9c1b68c187ec3edfb0a77b81072f4ae7829ee71c7e07b92a71655a43a87d8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SEYOK1530886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65f4dfd891f7e02c33b938212829bd75eef67d6cba0fd774e9eefb0358b773a. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/SEYOK1530888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef4a3355c61759dac6a89aaaacc6121cef407f44a89572b760371e82fe2d577. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEYOK1530889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f91189c14cb3c874309ca2acf83b5bafd5d778ec655a41e646b7db920eeb1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SEYOK1530890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6986476bd89e2776d5dc427e75f52c91fe18563dac7a2103df7e786e5dacdb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/SEYOK1530891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc821042502a0fdb4934d8f991418c9722718e9fc848c6e32f0df0a34aa9ad6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEYOK1530893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785f821f541ff2a8d21e20b32aa1586c9a9c9b21dbe511f6e11d4bdb14ee3b13. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/SEYOK1530894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d1172e5f924b4640f42c63e3d6790ebc9f28b127a96136bc4088de9d2bc743. 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/USA2P2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c2f93c44ba7b47467944e49901945d682e8e6290dad3ea2a6ead831d91f35e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA2P2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07758dc294222e396d3612c3783480ffa0e9f7700d9afaff23e523cc8a0503f9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2P2200003.