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 0xf21781a1f24a76ac41cea2d970ab90ac05fe22ed34b1e515e786111dac33cfad. 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/b29179a6-f8e1-44ba-bb9d-bf804812ee40.json and https://artists.proofprofile.net/proofs/artist/b29179a6-f8e1-44ba-bb9d-bf804812ee40.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 0x59eb18ef294c2fcd41161fa268c8e959a5356d2d0c86b4b8b7516cb0166e73a1. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/UST8K1893548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cb2288c7b2fdeba16f2e51ca4d5d80c26452460f931d782f98153bf6b9f506. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFYZ1921735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fd3bead71d8caa9883a261e9fe261aa92aea18a46c31afd72285e246a54093. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ1921736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e4f5dc764ee88394d71c22cf0a9db699c41cbd172891350f51519b993ed9a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ1921737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450b4a37c29d821f8bc0cca6bbe9536a797184490f75204e697d7fb82da1ba8. 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/QZFYZ1921739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47782778904de94f1156a0747d8ff9de2f7912a8630662a3f53ba9934d44c3dd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYZ1921741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32dbf2c9a69660c0b472f628bc764b2a8a6320f9111badfe566a22f55e638e9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:11:37Z), 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/QZHN82001596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a032ea0a72945437fe94497353bfd641f42841dc83c83723db04a2b49591351. 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/QZFYW2154454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c0c53ed1202544c3294264fbcdd3c1347de33d0730cbbe7dcf705b91fbaef4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:29Z), 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/QZDA52104081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0fc9a775d280269a68e8f8253822a51ee7e31fc572e7cdfdc16e0d55d25410. 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/QZDA52104082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4191b3376a516fff8a5d41d630fc8619df3d16623f6d10f079d7ca280431d2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6P2186728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e18727800ee9d506e1a426e0b32c37681c07d29e41fe4c0f2f54f66b972a6f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QMFME2476002.