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 0x576a8d7d5e768fea7c51ed64217eaf8d49509f0427dd88ec55b9d24ea46e58f8. 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/13c79c82-0aec-4fd0-8b12-17909c006dbd.json and https://artists.proofprofile.net/proofs/artist/13c79c82-0aec-4fd0-8b12-17909c006dbd.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 0xf91270c21f0629ec9ad926257892499648d1ed81de3a236bc44119608ec1b1b7. 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/QZHN92449882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15dc29a8a05023d77b90ca590c7786a20de11efc0c7bd452c68c17dfc24e29. 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/QZHN92449883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a01971364a13c59f904cd9e9bdf3f06089b48ee8cd8319149bf344661280a43. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZHN92449884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9895ba6095e2fd57d5b8935f39f04112a9d38bceeaa1336987c699464907cefe. 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/QZHN92449885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b95bc7fe01af81afd4a184d5c60d939160e473b51fdbd03621162f8e14ad9. 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/QZHN92449886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47cb85e17b881480d7538270b253382e531f9ea7d96c49eba6f310867bf8cc4. 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/QZHN92449887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd61ca8f95fe4746dd0d20b62aed665ea6adcdbfd31155beffc1fa03f78b810. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZHN92449888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00db4c2f760fcb6cdd69c3cc0901374e99ffb6a6016ded450136a17cb2cee43e. 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/QZHN92449890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81005b2c8115b7ebe9e074c43d01ab67bf4929a7569cec8e186f6874fc3e34f. 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/GBLPF6781258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95852b50e94e524a9e79cc76161afbe3043d1e5dd2ffbdebeb125928b5f94ed. 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/GBLPF6781259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f968ce52b7325ecbb4b8716081ab8abe7caea37aeaf6129f0a76a59248b1640. 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/GBLPF6678871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e090b958f705b42d8f872474ad3479f3d241d4258977bf64315b8e7edb4826b. 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/GBLPF6678872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38636d5ef70ab947844045a88dedd13875431abec341865aab6665744e22520. 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/GBLPF6678873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ccb5b98f9a2f4c9e12ac99fe83e301f915e58cd3284efc98523a8f48a6802. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:32:48Z), 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/GBLPF6678874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd66654efa9caff52bdd1c76cdcb37e48e5ccd34b5b5ef05d464ed95576b4af. 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/GBLPF6678875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3454cda05f95ae5fa50f3cde51cb7dae4016ce2ddddbf9a755785e4b9acf0bb. 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/GBLPF6678876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8aac3cc7a542a849f6035d01e64e08e9646cad63fb96b2f00797ee0c2f3685. 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/GBLPF6678877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e86293e11976babe2c4129ce69a5295f51260bfe680597007dad7fa0375dc. 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/GBLPF6678879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f04995c3a69756a0035982bb0f4e25daf2d854f051921aadd386cc8abf19b5d. 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/DEZC62419843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415da0c4071bd0442f5e3c5fe97010423c3486ab15f575bda2fabf341ba761be. 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/DEZC62419844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38bedad8b2fd84bedf376723876fa3710d884ef32d99282c556474fc457ccba. 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/GBLPF6782239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e27b257e43098febaa8c422a2f92b5655035d5c26a6bb3c68b8cfd31cae5b0. 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/GBLPF2508428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe415f63f7ef437ee02543d80d69eb36cc127abff8d50542b0ec9d065d704deee. 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/GBLPF2502427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fc2588362994a403e63bf8c9bd846b1a883f7c6abcc900150a078e917298bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:53:35Z), 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/GBLPF2502176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e0070aafa981202f93eb743e64028b7d12942f0583d41d2d62c075adec522f. 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/GBLPF6809156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9d2e094b60b3c920982151f093d78b7106ea101a8ac794f3eee3ef87208653. 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/GBLPF6809158.