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 0x7d9a8d6b26010251697c2a35c06a1ced0212b3253b5a0323d16a23f06795657c. 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/8a8f7fac-f179-4b27-889d-b22d556942ea.json and https://artists.proofprofile.net/proofs/artist/8a8f7fac-f179-4b27-889d-b22d556942ea.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 0xfd0d63c72e776de8a9981e03c07f22a282bf7175c1b4b4bfb8a7b9a292b00605. 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/US7VG1710023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70274a50db4c76a2c73803a81310bcd79b2b1193b48f3c0dcac7ca3d2d5f6b78. 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/USHM21502657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25431f2f07bcf94cc98b135ded0ff79ee7db4c7aa321bf1d69f76cb0d8ebc9a. 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/USCGH1650912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1202deccc351b2913c54cd7d8df0a81cc61213ef16601cdf71b301591cf29b5c. 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/USCGH1650914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31a5345b93cef158e19668f88c94c2f7ff778d4ddeb769c2d8bf25b8f917b1e. 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/USCGH1650918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702f418797491027fe56fab7f0587359b8135a5850e11b011c2599abb2ac0c09. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/USCGH1650919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ad69ec2b2553f91857d447a609d7f4b9f7df28615be432e2ed510f723ddfae. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USCGH1650925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc285bddf9021fb10a6652d5811e14674e5f416fc874d1c863ce9f71a520d81a. 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/USHM21822041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683e8782669a83245f8fbf561c0443fbb917c891bf7104012241d170f0bce8f7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USHM81816888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb8eb57e0502e44d8ee276558fad4470262ecd2c652584e40caa3562e71e20b. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/USCGJ2054501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1e3e6b578a22dcdeb2a7a8d9254476059c39e94caeac47f676c0dd475ec2b. 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/USCGJ2264066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2228ea4fa76cce55c374bd48159d3a5fc2bf729c255055f7d1c2204b76d7c45f. 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/USCGJ2264067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f4e9e98e529b35e9c871b6fedee5ba85256aa4b4c82b288b91826146b7d76b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USCGJ2264069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd410bb4fec662891b57d8bcc4136b3b9a4f666182f8289395cba08226eca670c. 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/USCGJ2264070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a27a1d772f536a03e94096bace5983ec4aea5f67d265ea364dcc1fb10a47be. 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/USCGJ2264071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5f8e32f44261caa5f4cb3173b0eb57e5494778273543fa9ff8a47d97161e0. 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/USCGJ2264072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b82699753eeeb086975ebfdde8f5435e45a3476c9a06938693b770724d034f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USCGJ2264073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcb4cadf46e7b6221dfc07cb3af9d53260d5264a106270f690d0c5f5c05363d. 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/USCGJ2264074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f9003c63a248f43370a722d34a75f2dec94f4c34ed45f6674e33104244c18d. 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/USCGJ2264075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27523af1417700e8a2db71723894f5bd174afe5160a11ad40d332d717c8fa23. 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/USCGJ2264076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a58c4cafdb4b0920487b43e725f6f675ff0cf41d1b7981c71264e7c28ead671. 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/USMH92316127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101d9fd80d4f6770e769961acabe9801726a530b837264f781a44446987d9f89. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM82391381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07637858e5d1ba17fe5f80025543a0bb71678db27508b86d8a65dad43550e71. 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/QZTV32361405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b464d553c06ebf89f1cf506ed777fbf0875357063b3059b2faa1710df82967d. 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/USHM82427018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e012cb01e503377a5d3ca6a62b9572f0f2dd5625d68f2a49e056477cfac988. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NL8RL2444374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0485a8ec284c557c70eaacc1ce9f8a3747dc8286e98e740f2025f1d053f48a51. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ2520776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0421e7919d503aecd7e0b8b953be879d3b0f7b2444efc3a7cc565779f9dca9a1. 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/USCGJ2556447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a99348a604e00a720140ab3bd7196de6a0a4bb3ab3356f5ea9ed23860ebe8. 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/USCGJ2520705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe231f0a43c6bd9c972543aa281f81e7da86bb2a77c6cf46264456f1df3b31915. 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/QZ22B1822817.