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 0x9b80a75d3409b3623ae891fb344086eae8f1ebf48f2abe09216211b1ffcec848. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e55c26d5-3067-48e9-adcc-820edfc28dc6.json and https://artists.proofprofile.net/proofs/artist/e55c26d5-3067-48e9-adcc-820edfc28dc6.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 0xf4fb248af5dcce48de542535533c31ab15fcb099d0b16fc15b9b4acfcb9d098e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USMN21800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026506f35d3dcb9b0ea2839a02296fea4132645a337c5127b0c9b43450934fb. 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/USMN21800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3383a0a62dab1c89bb69fc053061c06303e0789921147f9601e13352563e327. 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/USMN21800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49d2991b01b51449c3b98019e8d577cced928ad3ca5c5e147fd89ee4b1fb8b. 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/USMN21800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb248af5dcce48de542535533c31ab15fcb099d0b16fc15b9b4acfcb9d098e. 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/USMN21800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe559d2a740c4f2b9e98dbf062b8723f4bf9899c54b23d192589d6666900c61. 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/USMN21800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fb248af5dcce48de542535533c31ab15fcb099d0b16fc15b9b4acfcb9d098e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMN21800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026506f35d3dcb9b0ea2839a02296fea4132645a337c5127b0c9b43450934fb. 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/USMN21800002.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026506f35d3dcb9b0ea2839a02296fea4132645a337c5127b0c9b43450934fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMN21800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3383a0a62dab1c89bb69fc053061c06303e0789921147f9601e13352563e327. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USMN21800216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe559d2a740c4f2b9e98dbf062b8723f4bf9899c54b23d192589d6666900c61. 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/USMN21800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf49d2991b01b51449c3b98019e8d577cced928ad3ca5c5e147fd89ee4b1fb8b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USMN21800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026506f35d3dcb9b0ea2839a02296fea4132645a337c5127b0c9b43450934fb. 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/USMN21800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5026506f35d3dcb9b0ea2839a02296fea4132645a337c5127b0c9b43450934fb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USMN21800002.