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 0x6acf520d5ad8c6ca8f5a3b620bc7eb871751611d6651b6ac75174029e59a5503. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41fd4439-e8e7-438f-bf62-6299128b563b.json and https://artists.proofprofile.net/proofs/artist/41fd4439-e8e7-438f-bf62-6299128b563b.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 0x5e0128989bfb5caace19565481900372a4e845b828495d4ffce23b5932aefa5e. 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/QZFZ32203417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a828375ec49775e4d0cdb6e7f7816c461895b28268c822598c51c9d5c282b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:27Z), 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/QZK6J2235757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7eee133ad1fc4c28d5b4d165ae22a431f911ccd96efababef87896bf0d9645e. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:44:58Z), 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/QZMEN2270988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55a5aacff3d8397164848faf2964dd49836d0e2a5fb388c69aaee69043324fe. 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/QZFZ22334490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66ff350e8bed5b72e9fa848ab8df1b40e5e0947b6900448559d4f7aa2f1a47. 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/CA5KR2364072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548a0ebfc24ef0a797d4dff6011823d274dd327356fe3e9f649c4edbc90e8c0. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ES5052400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfab0a17f3b87d724cde40d7892ee9d0c83f33a0cbf0216063d319db5409ac3. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHN82455262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e0cdb4cc247a5b941ee7f673500ace67546fa056f5563f856e87656daa67eb. 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/NLRD52401534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0082cc3573ec95e728b56a76886d9740ee9e6def414b740a15af3317b8a7ebce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWT2488611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72951c988a65647237ae22e4ecdf1e56c2e62a8d601f38619656fa7054acc1. 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/CH3132419617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa40fa0cf73cda973bf91a140ed7b9b0e4ce1d9f9e0328f3e591bff363d104dc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CH3132419719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a4cc0f9a92c7e13ac8b3f9743e8f1c7635300e47a9092d549c68547c083ca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GX3HH2535066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b545f5b48523f4de8a6de710761ec3a07ade5587fad63e234b76280a51b75b0. 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/CH3132419708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9220e9d6bdc792d05fb509280c0aa8208e65039b9569a6fe9a6174c048db16. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/CH3132419933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998637c06142e745e918e96f84fbab4126e8c223b5e3a9e72a036878a299032. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USNRS2544317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c453333ee984876baa914680b7fdaa96055d4b64e8333d3e33f18eae619930. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:46Z), 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/CH3132420203.