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 0xc6e0666993436e5ba9fce96d0e851a444230ab2087bbefc126da888e88cdc933. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b79f16f-ead7-4fc3-8ba2-b0204d019aa6.json and https://artists.proofprofile.net/proofs/artist/3b79f16f-ead7-4fc3-8ba2-b0204d019aa6.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 0x67db3f87fcbcc369bf4772acd757e43040983d075ee1eb975226be3e0c83929d. 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/USJT11600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7237b20ba8581cda56d69f26fedef03994c90f3f41950313843e707627c36833. 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/USJT11600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645f99b11295442b63b403d3f3198119a55ed782c2527f34326e7b2e5f821149. 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/USJT11600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e211a07d0410aa5d4cccac6c53414d2088832528c0d11acab003681d037783a. 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/USJT11600326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3040cc393d9e29b3d5dac3872b0b8d6c86c2fbeb4810f82a7247b57c154170d6. 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/USJT11600327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517d1785b55c7f5373b838bafd18bfc51eebbc7dd82316a7cebf98ae7af64f0c. 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/USJT11600328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a612f0b7f5b5fa3ef0379f4af5f330a26a92c0ffb1f287552487c321ff2876. 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/USJT11600329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ac136744e14db3a02d7d6ca04e9cfc1a4eef48f5b4bf1f266e3e64c9b7816. 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/USJT11600333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e056361e5d9efdc4e4deacac9de10ecfb8739c8bd434cc41a2f090c5857ae9. 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/USJT11600336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a82217f5713e1ceb69a8cd21f50ad5f594bb4502fd2360695b8d7a82037a13. 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/USJT11600338.