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 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 0x7fef9afc0a1cb1bbf914acd06c6d38b861ea47817744c1ed523b1de93cebbccc. 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/168d0aba-dd56-490d-9ff7-705bc548734b.json and https://artists.proofprofile.net/proofs/artist/168d0aba-dd56-490d-9ff7-705bc548734b.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 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 0x3033da96d3e3c1d3efff7ea8a9e1ade2d54537e04ff8a95acc3df533c4a529aa. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA561066531.
Manifest Tone (The Best of Volumes 1 - 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89441a85d8fe5170ac41f1b8c6eaf1427c6a40a8e921413dbfbfcb7eea14cc80. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GBUQH1200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89441a85d8fe5170ac41f1b8c6eaf1427c6a40a8e921413dbfbfcb7eea14cc80. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GBUQH1200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f1a310e246279d5c5a526aa46ea229fd8cee5ef29ecf03ed921153b2df9d03. 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/USGC61600686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea3307a46e131ee35acedf778c6caa22846edab57df97647631f555df660060. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USGC61600687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d615b95d10bf22c77536759394d5a7207bf1b47dca802764374ccf8a5f5eb2f. 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/USGC61600688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a63258be2ec354bd8a2981c54d5d490b5ce72e467f75200346bf52bb51ff6. 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/USGC61600689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db68f6c6a1fc174456256aafb217ca033c623592050f075fcbb437edb4f73a. 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/USGC61600690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6ac08978a3500f47cb07a0640ddbb24d62de718407a69e553daeecfd0af1f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USGC61600693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8770367f0f332e8bd3625aa9e1dda3660fb317fcc969d27dee59ae44f3afcd8. 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/USGC61600694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e9f577f86e41706e7d05349c458e7cd97841cf153cecc85a04fa814329b91. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GBUQH1500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76e9f577f86e41706e7d05349c458e7cd97841cf153cecc85a04fa814329b91. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBUQH1500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581ec5418e3ba399c0e641a998f7a1f77fc5842eccfd9cd390052e4d7d581509. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USGC61600619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fc7fe18297fa707cef217fba7d1711b98e51841d3db43499b1d57cf7a5d5af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USGC61600620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5556061f7600f79dcf6e1e76829ee5c72a385e9aea7f108ff938f1082cf78. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USGC61600621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946d01ffec21e8f0d02b64c82ceb8fd148c20374c9b67692d5525448f07d15ba. 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/USGC61600622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad7d4a517511f16e78f34dce7272e30f5abb78464e9cad4e4b9d503449de804. 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/USGC61600625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8817d15bfc983d76d6e4782bf2565ac5017b3ca4858ad52a023a53d3d8c37b. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USGC61600626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91314849a1e933d7606eb2823e388502be5b40028e1f9369fef9a7409f2016c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USGC61600614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908b9ff2d506de8cd64ad65a8d6aa3766f20f991828848bc32f662c2aee3509b. 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/QMF661320307.
Turntables on the Hudson: 10 Year Anniversary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ad8f229fd5a99b735fc8aa762a7e96d710e07fcd1619978899e7702f81193f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCCW0810137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7bd16c62e88cc30f06ac5eeb6e6d3d625dd3448322673c749303430f51c6ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR4EO2000072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb339f13779085cceed5f1aa83763f7061e8dd4433e7ab8c4c3a7a068a6b288. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11002036.
Turntables on the Hudson: Twenty Years of Good Vibes (20 Year Anniversary)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f1a310e246279d5c5a526aa46ea229fd8cee5ef29ecf03ed921153b2df9d03. 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/USGC61600686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daebf62c4455785f05dde4daa081e05f9320380382712ce20f93faddea3ff56. 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/USUR42341804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427ba72e6719733891d1314d462522b281815ad35f3628a55e1d77ff0ea242d2. 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/USGC62000916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab458d8b078a7d191e03aa06977de7bf71a8c44267c32a7059c35be86c3ef02. 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/USGC61500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d9bd83a803081b4fe01d241c64da825910c648dc242aed0122ce3960f6933e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USGC61500503.