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 0x3b2481e30bc753d3bf0c99873e7ec9e0d9fe9a00104f873c2d2b6ae382af2435. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4213ed48-f170-4396-a5b6-4a0c6c0d0db7.json and https://artists.proofprofile.net/proofs/artist/4213ed48-f170-4396-a5b6-4a0c6c0d0db7.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 0xc49078a2a2dfcee881f25b1550867e2adb1817bfd6153811cf4e7e9cd8b1c7fc. 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/FRX201747410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d3624c5183b31bc590ec94da3b4405df76e6eb7a89742b7bea80b54b36494. 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/FRX201747411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3300091fabf58de5509b7e80313fc991fee32ebdcb505f2dc1c03a34b11efb. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX201747412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669e3f9727e9cc9f1c496bf99e4ba686292d5b993221464d9cfd5802878eec10. 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/FRX201805642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e60495c462195ad585c306155ded59627f6afd1bafa663ba6c2dfff9c2dd85. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR2X41929389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e72280ae3b39bcb6b999a1a8a36fce4f8077eaf0c5cd5fe482956b13b7fafc. 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/FR2X41929390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d3963b12b91bab64a59bd312526527e0a9a27b29f363b783933ef739f8effe. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FR2X41929392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e818f5229678c7b80eb98f59ed00cda4e66f2badeaa5ec3a63664bdb225fc. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:15Z), 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/FR2X41929393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b95ba659a4e965812169e7a86028b62d6a27cc017a1ee8e102bc46307f19fce. 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/FR2X41929394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9998d51d0ca769c2d39ebccd477d8cb72fa622df6f08dc121432c1ab38a0b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR2X41929395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb26f29658c4b89e29c08479070cc513d2a314c544e81faac45e8c8647286b9f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:47:36Z), 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/FR2X41929396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d7a240c65fff4db3e851e308d8064b06bd04816ea7fb5ee7f1ab36469daae6. 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/QMBZ92185230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afece9fb36056d6fb6fa22c39622eb8e37a3360d653ff4aac4fd470e1cf3707. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM4TX2110377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce86050ef82f16ffff3674ded8b53fa92959bd58fcffd76d566772c26831b203. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMBZ92185232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a25d853801323b5dfe097f67217738811418d36c15153581efe08230fbce8d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:29:55Z), 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/QMBZ92185233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285bd41f24d816d278c54308344f6a0c69d45829c6926c7ee17fbf4af9da4a8b. 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/QM6N22179653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d71c8bc01c5181c123cca31c66452cb1bc399190448883903267d46e43fd1ac. 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/QMBZ92185234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3d329ea97c98b8217df33757d4a58288e421d926d40ca0c32fde033b05ef32. 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/QMBZ92185235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb214309efd38242f5be79d11f8513c03511027fff7cd76fb90c6a160ccbd9d08. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QMBZ92185236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c6f0b57e522158547ba6c2eff984cdac28565a56c7378cadf15fbc27db58a8. 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/QM6N22343584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67df23cb405fe5bcc90984378bfbe6c737a77513ec74711253148dcffd90a44. 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/USSTT2300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec89a957603977780e3b424a61fdea518ccbd82e3cd6c17df7f760adfbf848a6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:27Z), 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/USSTT2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa3bc954f51576c8a8168a53a42a78c99ddf5abd4a2338321912d18cec5c3c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USSTT2300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c1e5e5ae05c677877ea93269d68bf5f8d8ba806bb399adf92fe52dad84308. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USSTT2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58497159b668f31459903e86a1bf4860eca9cf4bfe7de5901e249abcfdb66e1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USSTT2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9db6ee69d2bd2d37c2e6bd48b2ccf621bf7e60f3b80ba5461b0e757971022f6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USSTT2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b32b4f45bd42bee7b5835852b4b9144d3a573e4724b8a81ad52ba660757e5. 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/USSTT2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff357e25f43da8ff3283717c9fc39e3ac55314d1ed8b3c674fe51f17e320a42. 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/DERK42200071.