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 0xf05184922c353e9c3afe8738965ba76d3bb27ab907dec5c49d0405c995aad85c. 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/71d64637-876e-45fa-89ed-86de53a2cba6.json and https://artists.proofprofile.net/proofs/artist/71d64637-876e-45fa-89ed-86de53a2cba6.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 0x372972c88ca94bcb5f5704952487def4dece74fe8ac1c6aaae128c9f488ec7b6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLE320900340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe178341db481fa4165a6139bab5d70cb49bc9d0ba4b69e4700585abbbc8ec12d. 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/NLE320900342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724ffdd7c1da79de0c721ef27a8c5f60aaaea2a924d79e4f1c88d5212828fc82. 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/NLE320900345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960ce40f4f4cf06d70053173991ef68cb6d8bcad80dc8a73353cd97a98fbaa83. 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/NLE320900343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc3a812b9f0cf4a0b9ad9e6bf55d6fa42b878de14462915e9a419ecf8368e2. 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/NLE321700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323015dc6cefcf9eaa033db4eb302395148f5b4390d358d466f1b8125c74bbb8. 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/NLE321700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f5da4227066d2987394cf88f80716580d86a4f51a14c6e4bb6322055813c12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE320900344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138fc7eafd41162728b30a527c586c5b7a6940e29f9c49d157ba729f84d34605. 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/NLE321700265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4031ef7f3bffaadd308009e901273d6ecc228f040648e7a8c6967cce262339c. 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/NLE321700266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfd9de8fffcf4203d00a71064c8eb37b82cd9c0c7eab879b27cf6aa04809b2c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLE321700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123aafaf1242555c6c28db0a61eb6f7c239135f86d40f57426ceae83c92de88c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE321700268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dea5667feea1019bd9bcf51272f44e69f0e3d621d13dcc94740c2e88ed47e04. 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/NLE321700269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa802bb281de8968ff51f39d7109e208341fd9600bc2dc9ddd50c4dbe10a45408. 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/NLE321700270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca37e3acadf81ebc7b8b50bd512afc2b7deacd625142f0ea4abe6112c9072497. 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/NLE320900341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1edd9470849f379f575d77a2761cd43627de08e62d7896567b4df97d25c8ea0. 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/NLE321700271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf0809b16a0760cb98dec70f6631b321decc1dc36807498d0e55309fa62fea. 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/NLE321700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9203a6b1c5afc23856ac293506bcc4219a92348c75b5f0c33cca6b0ec3dcabf. 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/NLE321700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93050852277b9b76cca09846f1f8c1f29d6247d4f97d11810cb5abf7adae1b23. 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/NLE321700274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735981ad65af18dad40735e2dc65aff915ba10e182c0c13a96e8b6356f9771ed. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLE321700276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26e5277447c4efc2f15919a0b646071a44617684cb6e86834a11aaa49e6da87. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLE321700277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4fc8f218c99c74f5b3a5e7ccdca293dc94165b859361ee8f617593c88549ed. 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/NLE321700278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef0fe2ea36317ff914bd0460f2140c574922c74146ace71678774b473fed651. 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/NLE321700279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe087542c9b0529a2b69078a1639847b9edf8f40a18beb60b4e76e8adb88455d8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NLE321700275.
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 0xbdb9913ad50898f194087fd9c959a9f394641acbf4594be276bdf23d0d302615. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLG620450748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674634c465d65917bc3500c4c524f13c29c44dc12bc1ebd18ccdfe9fbbb8fb1b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLG620450738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c64cd88539f0f82df4079d0e4371a07598b58fc8fcdc4516cef2f54fa35f0d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLG620450740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389bb510607d87995d75ea0e321557d31315819133134ef7334e40f829ec5263. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLG620450759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5864ac0ab7d9b66ddf62dabf2ab62a77ae7048f69f82bb25f4808273d22aa9cb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLG620450761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb175f0cb4f6914828ec86f00c8b34d1fc351d1299ccef8b2c57529ac086dbab. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLG620450758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3708bb45e5032caa3648e4429e27ff09cda33ff52665fa0d77528048d87cf904. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLG620450760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c14673691987aa92403d0e9569998b6b0e785b13321a671da561f710942a7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG620450754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b2a6b64ba35ff82f7eb8da869b3d1b94d7e693024329b553b2170a1c6d8126. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLG620450755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58ca65e93010fbe49057c2ac110e6c3e24023495ad582dacde4cd99adfa7f7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLG620450757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d357afab1f69714a31822d137b24ab23b35d20b2ecd5037e26e452db1ce7640. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLG620450756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09912086434a8f4e7e6a05e303d33498300dd06a89c4e0be78880b14d98efe3. 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/NLG620450750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc66ddb3dd5087cd904cc144476a2c2209d916055d990c2a367652cec30496bb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLG620450751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa516470f5a2062327ab28abdc51c30818c72f5fc3d9746727cae43b5fcf89008. 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/NLG620450753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0244477f6d3de0b7b4fcd1013ad7cff40cd0d95bfc1b49a76272f3e6b0f9c6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLG620450752.