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 0x25eac971915d0d12a37ba7cf3788de1beea64ce53e276e997060fa636e112f8a. 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/83cb1b79-6047-40d6-a619-dd80548860a8.json and https://artists.proofprofile.net/proofs/artist/83cb1b79-6047-40d6-a619-dd80548860a8.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 0xd655c4c2f6f97ff8ed65fba2143fe59fc51ac9bc2faabb1b560b7d1558120ab8. 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/QM5L81500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e7a1c2aaa1f6cdea8aecf4df7ebeff97bae68a588485655e82b7710860ffd8. 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/QM5L81500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ba0ca9da56a95cac3cedbc08c1585df836eec9454a55229b246d87f84dce7. 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/QM5L81500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd25c42dd9a6c7c6a4ed00b4cde1941de653006ad8255a421f48b08bb3af68d. 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/QM5L81500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe988b9a71477e41ce136d9bae6d8b9b58d65a2a535918dd8d0cc356cf8e469da. 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/QM5L81500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0efdcf05ad1f8aa47686f353a0dfa573453743cb650acce92c93b0c67c8449. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:52:29Z), 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/QM5L82300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade813b94298e30f4304b80ca9439eb9609b77abfdb5bbefeef1417110f62490. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM5L82300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725baf53652ab6b3939fe7210f4d2671411689a78d35744447a3336cf8f13215. 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/QM5L82300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3021ad6d58d46b207ec862d6d657e2aa782d1f667eed776abc39d213d04c4b. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/USLKU2596022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20177109e15eadf7bf2e2baa3ada5c8cb5849cfd87a84dd677e22d7726f897dc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USLKU2596024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a66a8b40ddbac987a3f16480655ce472f28035f04310ba015f9ab5b88834878. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:30Z), 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/USLKU2596025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30750e335f8c6883b43d0edbda9845be3efe048b0ce0e1bcd90f5b4ff2d2fca8. 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/USLKU2596016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693f4b7d2807e5f617f847a84f2a0071675c994a7e8543b4bafe3953b77d691a. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:46:16Z), 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/USLKU2596019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c857d6821b25463d666393e8fbe38ad15479acaeb6758d43fa77b9a4e4e904. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USLKU2596021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac45862cf29b32136ae1468494aa0b471bd3575df1e294b72ead7cf7970631cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USLKU2596012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f7d4638ed681a8a3768898b413c35d12c73116723580102d225622f8bcc550. 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/USLKU2596001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226dd0f3df1054cc4b658597610db5da3c467c4d648c65e56a922b4e116537f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USLKU2596002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa65215fb1e30a9d5428af8ec9363edfacaf477301d2d45817e9a8fb8bb2e789. 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/USLKU2596003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751e27c18a17dd1b2bd417688061c3477629cc6ec758106bd3c350f523be65b2. 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/USLKU2596004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6509d68bd5933d68033e613b4aec2db07e2c07d5d95e5f8ed517089bdd85812. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLKU2596005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e29672292908d6764defec90a03242cf928cee016f2fd1ff5d27f1408def1bb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:25Z), 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/USLKU2596007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f4f141e629fd70d3dae3f28d9203be5ad831e71608f99eee707251ceed4ed3. 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/USLKU2596008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb26f0bd001c19c21ab81b82866cf209f84f76d23d619619a7e1250e4965119. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USLKU2596010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791b40c50cbc00ce2cff6fa778881bf229adc96b54b22f6816e8f2652dc38120. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USLKU2596013.