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 0x57be0a7d535f8375eb738fb744dd4f53d174b4a2d038de2f03a9b42032d36353. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba5ae02d-fcb1-46a3-ab0c-a8d817a9a275.json and https://artists.proofprofile.net/proofs/artist/ba5ae02d-fcb1-46a3-ab0c-a8d817a9a275.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xfbb380eddd6430bc1fc451e3186b27fa957d6f058ed6a36b9255c5eb4da2d792. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:25:37Z), 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/QZS642366676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd5583af7adc927a46396aa00d96ac2dc6bf35738c2ac0a4328dd0b6f0cdb88. 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/QZS652393417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd5583af7adc927a46396aa00d96ac2dc6bf35738c2ac0a4328dd0b6f0cdb88. 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/QZS652393417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566fc0a2b8e8baedac01d60f9a9e2398e8bfe995c16774ef2a0a5598e2e066d. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZS672242907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7566fc0a2b8e8baedac01d60f9a9e2398e8bfe995c16774ef2a0a5598e2e066d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZS672242907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4bd818984008324d3648f0ac572090873b0009e8873bd647f8cecf06557c8. 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/QZS652400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d4bd818984008324d3648f0ac572090873b0009e8873bd647f8cecf06557c8. 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/QZS652400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94065b17201eb55f9b08bd9da3da55c7b317705b42492fb3839c884558157a34. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:22:17Z), 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/AUGBT2505645.