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 0xbb5d4097a8655e1a40dbe6029887eef83c8cdcae1f1527dc72b5bef4fb964493. 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/953cd3be-2688-42df-a8a2-fa6c3a6cfbac.json and https://artists.proofprofile.net/proofs/artist/953cd3be-2688-42df-a8a2-fa6c3a6cfbac.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 0x56fbc39b6430304482d2e5239e32d34192b1d1ad59b6665808e18788b9a82f43. 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/QZHN52227990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda14a99ec59b1afe59444f446b4552424d86014f1f63b513c943aa81a44241a2. 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/QZMER2081408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749446288b8ae31fea73bc20fcfe3d288136a2de4e7be279799d540e0a2f6fbe. 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/QZHN52227992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d4c61780c7dd355e587ca930dfb3b257cf65b43fa32b205c19c8ce6a5b812. 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/QZHN52227993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156640ed710011c9a06f800ef19716d91be817559fce4437e58fb7b12fca5b6. 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/QZHN52227995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074a018cae2a24b6b655aa761fffe01c361cbdfa4d35e05f1744e11d0f619e5c. 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/QZHN52227996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b07270f8e45d64fa907ff14e6c7434d5628f076c3dbe1b6361055c5c14c875c. 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/QZHN52227997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ebb572bdd61ec46d5c73ebe9c244a3710943374221958be99492975f97117c. 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/QZFZ42162509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda14a99ec59b1afe59444f446b4552424d86014f1f63b513c943aa81a44241a2. 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/QZMER2081408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a92ac1c890f279b795a7837ff5fd11e7256d8a2fb635ee72782b12ed946f3. 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/QZES71806231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c2e19c8c19b2845a5c7dcd29a846dfdc414823fbf5b0179bd096db1e16b49. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM2PV1810505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517ed3f96c7deba88f8e4a2b18b0fa2f6b19137ae6b8c6d04cce7fbbd57dc122. 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/QZFYZ1939156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e0cc90575005051cfcf4d835a402fc5dd00d137e5d9076a06efe5f63141bf. 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/QZFYZ1939157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224a92ac1c890f279b795a7837ff5fd11e7256d8a2fb635ee72782b12ed946f3. 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/QZES71806231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2c2e19c8c19b2845a5c7dcd29a846dfdc414823fbf5b0179bd096db1e16b49. 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/QM2PV1810505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423dbdea58a5bbcb28f953fac4d228bc80fa8977853eee88d637197f76155e9. 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/TCACH1580317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22108fcc15059d039e67485260a1217b78a19327627365df3fca502baaacf98c. 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/QZHN81931875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9601a84ce00e543107422a05483a4c2f41925d336c4a85aec95ec08ecb081fff. 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/TCAEI1974040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ab1ca949f3625f989650382205cc787bceff0c87206746d6c048141791c888. 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/USCGH1816325.