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 0x2c628f4cea6723e4e8154a6509c42ff4d5d7b4ed2d004f259c787742ba4c69f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3b2e8c2-fe32-4782-b965-747b6514b768.json and https://artists.proofprofile.net/proofs/artist/e3b2e8c2-fe32-4782-b965-747b6514b768.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 0xf86432e893891d9b66a1bd18c8cd848fe61f447b5b5786f5b0363b516a913757. 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/QZQMB2105926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f02940692e998e116c33dde4c50941412b29d966c431e84c365fe18abfea0c. 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/QZQMB2105927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ca0b7514f40d3c9dd1fa9472ac0cbb1a0470897c24d77cbbbbe00a8b2242d8. 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/QZQMB2105819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb504e58912d328b2a79035d7ff7a81a319bcbea2a95654a423c5b810a77175. 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/QZQMB2104748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b21846d067620ebe5fe46c3863bafc6a53b97db52f9779c0a672ace168d6e9. 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/QM3DF2407717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757cd1464607f7cb89cb908377a55eb8100d4e572452a2be8bdeb7f22b921c75. 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/QM3DF2407721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7a79e52e3f0a9dd7193640e4c0bdf3cd81de03e578708b6ed9684c6319ea4. 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/QZQMB2107422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9000a96784eff0a5893e08484318fd746c33af5b021fd196f224167113505408. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc987c943ab1052ce2e2347b032eab33a566d5bf0f435a97f11724d5f4f9c39. 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/QM4TX2530583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb507d47bc1bf08b56b8289a9b5a1d75f623b2066ce3c02c785166e9a4e7ca90e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf4884f8dd321967084e05065d285ee8d0434b396ece1f9258bac6c54b6a973. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb91d9ec542a1c4d1d3951aed9c07d455867f71bd00d0eae7be43e6a24e4bd3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88845619c53dc83b17c007704cfcbce2707b756602d3e4081ff69ed348c0410f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69fedf3ab9664d9f4a1a5a4410cccfd08447293bb9d559b3fa6d60150a8a87e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2530614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce4b288f79d4ec374ac771df0caf573864a30f01f7daf65e67d6dc7e0e241ab. 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/QZTBF2466925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b77d608c318c8387c5a3e1b2cae175118aac242e38948edc1f0a93044bab2a. 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/US3DF2533696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe635cbe76cb4df1bc3187268b74f84e63dcf79f2b1013451e8e93c4bdbb600ed. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:16:45Z), 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/US3DF2517988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58904b072e770d0b7c5068040db6359dcaedf8a08d9de82d6d9f0163834c1bd4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:27:26Z), 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/QZZ772400944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fefd5d250a381f11f8bdd07df3712421fe4cf33609d8218473c1eaa87043c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTBD2473579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249919a5800a360b31583c073ca0bae91b24ade9a27cc5a0d1678b38ac58c3cb. 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/USWL12401785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8862b156f0bf151e32509f2e10e96719d91ea98996d0112cd20922c2ded31048. 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/QZQMB2106729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23e2f921d4983125b6bc24c542100b3d9d62d3c57fb5c7309494251ca11588c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZQMB2106160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df418557c73a3db4a42842ea30fec7f8b50538415616b0391684a561f8eaec2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQMB2106163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbcf73c861de00f932b0f603581c5293fcde9323722d28d6a7474b67eab5af9. 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/QZQMB2106165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658fa708d3ac876e8152b8030386a81dcd0643b4c6f6ce0f300860ead952603b. 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/QZQMB2105184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003bbaaee8b16c61bcdcc98a50e5b4ba7dc6c5d8b7308fc78d3d77aa47773a2. 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/QZQMB2104964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97b66702a2bcbef432c400a58ed1c744a19ce3e0fa5026b9ddbda58c5673335. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMFMF2446947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709a6993a1b26fa3b19c5e3ac6342301c8a29cb2fa34452a8e90c913a70dbcf2. 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/QMFMF2446950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86432e893891d9b66a1bd18c8cd848fe61f447b5b5786f5b0363b516a913757. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZQMB2105926.