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 0xcece7972286ace448b7614e534d9a7c9de06b842a6ff20d6f466083a68f33a14. 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/fae846a6-ffe3-47c9-8f8c-30893b8540ca.json and https://artists.proofprofile.net/proofs/artist/fae846a6-ffe3-47c9-8f8c-30893b8540ca.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 0xcb9429ff92fa81480b4c6b81c4e24e4d40f5b84471c4453e13e4f8f93b7a525e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRMKP0400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706d1e05cea867899a837dfa01a70e7a25e1edd459e7e79fcff95211e3c0862a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/BRUNR0700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2e2c3702445eb9326b90620af1b6f3c1c731761f9a2b52919d77a291d0da8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BRUNR0700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82d7e0ee59b2c73ad89a9937df5278948d7a2b19425965a3894c3035151d18b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BRUNR0700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4766e57d674fd17223c97280a8c5221efb2c9f2b27fd1be21241797b5b2b08. 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/BRUNR0700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715918460591e0fa19375d2576de951a55915736d6fef053d823b01eff0dc6dd. 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/BRUNR0700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc76ec73dd98f313df19ccc765d4d25fa7ca5b0629f7157022ec2a568aec9740. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/BRUNR0700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cf8c94bf208c8ee047adb35bb6f1c3bd2374bb1ee8478d56bf6889b5dcb4ac. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BR1ZN1000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb1159871c55ed722aba7b478a5b717a12626179029ed44fcb14c8112619807. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BR1ZN1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9816f7f163c783a83110127baf7f5cf969bc2da9325536098bbc62c3e792f7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BR1ZN1000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c83b566869f163f4f1f31db921209ecda61a5cf6c6f5ea15f9941ae100c06d4. 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/BR1ZN1000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8acebaeb3ba7790ec75b3dc19d9a390caff36ed99eb665e4e9e7cb4d60988. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BR1ZN1000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0d9350778f8121e981b41302b86ba8f5284cb589d8198479303c47403fde91. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BR1ZN1000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e6c3603e7e677719ef0b45b8121a84b1b0994015a17f127f7e34084a02c550. 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/BR1ZN1000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77deefdf8b2becda54b77513c8f6d14911702c08de466d8e2cfda3b2479fc58f. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/BR1ZN1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b3fbd0333b937b56ad8e17905f049c21fa44ea7dfa6741434c5e0d35baa75. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BR1ZN1200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e720127cd22443b954d250f0fcb06c07519691fa10d4eaf93466df4d6957de. 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/BR1ZN1200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707d2fef1267320852db5c99577b0308bf9d0de9b72511543a3124f6964a8f05. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BR1ZN1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e597760dea246b37f0588c7697969abd2408bda44855fb5faa6cb656c4ba8c7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BR1ZN1200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ace8d782bb30eee5a0092907f606acc1e53f5e0607c559ae6bcda8e371f3c0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BR1ZN1200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3470a450852140b3b744fe21766669e26fcb5f27bc886306140c7440ce16383. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BR1ZN1200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1126e139e52823d0bb79b5428b31e04ea140592b2f2031224b0ffabd42c9f37. 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/BR1ZN1200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0caa66fd68824d4163c79dad1b0ce6b4ce2c2ff74c49e6f25bbd209a60566a6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BR1ZN1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2058d55acebcc63d821f94258d6ea831dc4a3cf93403865fab593aa1cb5fc643. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/BR1ZN1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db62e78724d387008a845c67cf2c58e6f818890e60297291e65db36ba0fccb7. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/BR1ZN1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9c6e68d7ab79fe72778fc68a4cb68ab581e94d2f002f60c98bb2ac469d5ac6. 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/BR1ZN1400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538044819c07bad5cea5e227b2555444caffbf76e63f69465b6e54986dbfc1db. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BR1ZN1400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1bb7bef9f1867a165b72e22290fdd1e8ded281126a677d1865a7f4505e238f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BR1ZN1400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcf5dda34227ea44a2229c9434af79ce12d01354ade8039c6c7d410ad065ad2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BR1ZN2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e720127cd22443b954d250f0fcb06c07519691fa10d4eaf93466df4d6957de. 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/BR1ZN1200032.