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 0x42c07bbff124bf06f06341cd6913bded8f6768e35d880c2d59089d8ead844b26. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4942068a-f510-46d1-8079-dd78c28f54f0.json and https://artists.proofprofile.net/proofs/artist/4942068a-f510-46d1-8079-dd78c28f54f0.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 0x90f4d9d3abc21f2be2010fecfb42f336931e6ac9390809fe4ee2d9483f84da97. 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/ATEW52301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df4649c864f857800e412e2a69da6f2b6a822ab7b5ac5d23d631133f54489e. 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/ATEW52301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df4649c864f857800e412e2a69da6f2b6a822ab7b5ac5d23d631133f54489e. 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/ATEW52301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15ae0460fc28106f2751304eeb6ea23acce70171d88e3cb9bb40575516eefb2. 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/ATEW52301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8f441a40d47fa83bf60e533aca9a1b06e3f6726868ceda942e8c7cb6c544cd. 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/ATEW52301302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a85fcc412db94acf2057c19a8c209d9f615f94bd123cbe5f4c7c1ad410335c. 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/ATEW52301303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f4d9d3abc21f2be2010fecfb42f336931e6ac9390809fe4ee2d9483f84da97. 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/ATEW52301304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c43b3ddd0ffd07a2fa506e3952e09cadc8ad67a9cae210204dcb53b4035ef16. 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/ATEW52301305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9284ded77f5f4f2c9e1bff689300ed42663e32f46c772d6f9891c2eefdc2658. 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/ATEW52301306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df4649c864f857800e412e2a69da6f2b6a822ab7b5ac5d23d631133f54489e. 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/ATEW52301307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a497b16ee031b14c5a65e2756dd6bf520e46e34c813b5d21cf0b52232e0802c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ATEW52301308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5e51d66f84f6258f84d55d39e0ef4cb162047470cf0d3970dede1c00875f6a. 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/ATEW52301309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e52d05779060a263460720400ec842ed70e7cab12b4f02d7504eb0470a5686. 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/ATEW52301310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb134cabbfca39fdd0fe36985d65cad27000ab048cd7a9f5cd500da1127c8a1. 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/ATEW52301311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b06d03930f99cd1006a0c8be575746b2ede15c4b1fb756d565209b9e037b888. 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/ATEW52301312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47573a481e1a7dc470006a8ce9c0218dac62de90c8b8cc47c167f4ad9cdb47c3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ATEW52301313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08acb28a967a49a21fc9db7c65d33e114c2256a57b1bb1a3f59b4205c0f4e20. 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/ATEW52301314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cf9ca06d1123b8eec8ac20dbfbd3f94958861f0865e28484efd7ae51b422c9. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/ATEW52301315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03ce61c94dd46284cf32a95f97e5bb7e84405478908d3422610e994726ea911. 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/ATEW52301316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b7a15ecc8701f2fef132774f98d2ddf29c960ccdea3603653897d16a2a5336. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ATEW52301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19af45669ccdf77103d467fee6a345b2dfb1f0e5002da702471ec076edd90c78. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATEW52301318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aceb8e2b278d765025e0cfea7f0eccc07b17450e57701dfb8753ccb1c6c86d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ATEW52301319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4074c270b138d21a4d140fae210311cc330950c8a32d2cd01b1b963883610c. 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/ATEW52301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef75b9dc7a1ccb20f7b728f289a42a4c2b8aac64ddcb3917c9e6792ff8e6de. 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/ATEW52301321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1242c2bd493a2b6ca79cbaec78b4d6b11dfa5f623dedba7de4ef883ff0b783. 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/ATEW52402302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a41f19acad437981b5f4e8aee1ff5a511bd791fe66369ad8d303434ba2d223. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ATEW52402303.