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 0x17a545e861b8c7b6dd2dcdc5e6320cbfdc6ea970d89e213e42da1df02e675472. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1469f7a-5704-468f-8b34-411bbe0547bd.json and https://artists.proofprofile.net/proofs/artist/b1469f7a-5704-468f-8b34-411bbe0547bd.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 0x0aa51b0b5c6b788014562c63be5e87344befdee110088bf6e1f26565e4ac238b. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZLQR2016191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f16c4b940852d7444f07e05ff340b73340747ec75ead6569d7812a2211edbb0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZLQR2005807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75299e4f678160155e3a271187438b70ae25aa4522d30e324f8afccf4a1e41. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:18Z), 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/QZLQR2050672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be2bcc1a7bcf93edb96d4bcdb32865b8ba5a7996643e85011d114ce1dd28d42. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZLQR2050247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d65638920a3b6d0cbbefc4ad330131aebaf1b3603da3854d7915bcfb28e631. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZLQR2067544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83944bcaf7c5480c50a14c62b2399f4bb21bd538b71be83024831284812dbc02. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:34Z), 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/QZLQR2036695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ef5f6145b723cdec3a5a6e1119b623ca5f1848436e86d43300480c7e30a197. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZLQR2076975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a7ee6a5a93cf5ab611aa981078e5924ea3ee8c6e7c15266fc8d21b2647eed7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZLQR2068430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2326703118a32101c58506c9fab4a3f8403461ee1e881c82ef8ae52665deb1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:07Z), 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/QZLQR2010177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713455c4e4013c1867d98589077e42ab976ede84ffe9f20e0e05a89822abfcd3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZLQR2080271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60737f125ab3da7b7d8f269c642a74d8c539ead05a964e819db705b5294489f. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZLQR2054018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b76c8caff899b50be66b1b371e440b1c0f91502cacf7c582a07e8668636e8. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZLQR2082333.