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 0xd5412c85714299ef845833f3b38121d67ce95964f6eb518f27d658a66c95fa77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50fd1d4c-a3d4-4b26-9e71-7dc0aa762d45.json and https://artists.proofprofile.net/proofs/artist/50fd1d4c-a3d4-4b26-9e71-7dc0aa762d45.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 0xeb3399b8cd881b68f95cae050ef916b0fdc7b156bec24b66c4e2e47f894900d2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZTB92216386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71e8c3077296db56475a6602a6e0bae40813e18ec3ced433278963fb94c8984. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZRP42111568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856d6d091caf7e1dd421afd4831de1f8afcc42a95c6bd94dcfdc93daca7202b0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ32330434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6193e009168b71d53aa5d3f80898e1e74a40390b663faa8c0abb8cd61bde44c7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN72360729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436cd7a3a5156b2ed0e85028b6e33651f42b156b77503940858ec5ae67d541f7. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:23Z), 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/QZK6K2365121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c8d4bdc82c54a9188dae8dede46b66f280ba20d5de3687bfe0b1592755190. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFYZ2431464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03e50accbbca33720d301355caa8985ad5b9e594ed486f81ccdc1c22c62283a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWU2414509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e627119d437d87fc9b5838b9a248999b1ca079146f4dd4b0183b74129f5123. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CA5KR2517260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3909b46ed50ed0fe19338bd216f1f4c510793380d2d5f58b9557e8bda2b8a072. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CA5KR2517261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9adab1df566e05478219ff5ed5171dda12657db1d4c2b20bf433efd9f40217. 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/CA5KR2517266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab525a40efa13dcc4cf49b1df85604cfa022cddc11d3f152c6e91443fdc0a28. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/CA5KR2517267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824f7a65f525885e9b913602c6f27fd7ec015a9a9a69eddbcac6f75029165c03. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:22Z), 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/CA5KR2517269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec181d0f8882615d3af24bebcd07072640381ceec8d4d2ee76be5e8f8f8427a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2517270.