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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0321ae46fe77e21d227ec69660e9791e0de5c5a62303aaa971a5da25a7c72975. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b5dd239-206a-44ce-bcdd-a65747cab38d.json and https://artists.proofprofile.net/proofs/artist/3b5dd239-206a-44ce-bcdd-a65747cab38d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba253f9873dcdf399aa2ce4f69ee749446bf3985d795942b87c01e51f3280c41. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2202013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca75f471c8c6926f1c989f2cc03a3c616163c1a2ee34c8b753c6cbda946ab425. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTAS2202014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec66592f175155a9481ae893702bde743e524046123bc15d9cbb3f164a98421. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZTAS2202015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575845d056abeb223fc7503444294426132ea21da992ed03e33f0dafabb52c0c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPLR2180675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7f917a752dcddddecf6fefc1a7e978af4d41f4a8911cb2ba123fb4894b0ad7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWT2018709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf127dcd0abb6d4cb58fb2824f230722f8d53c05568b3dc8ebf049a8a79a85cc8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWX2302264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a08795a6f96077614d8d90aa5a2bb139c5e25f0fff5bf1d24dfc98d78292194. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZWFF2349113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390fecaaff1bd69f09255c859426fa4324e64d75d7eb892ed24339d89731e7c8. Chain 2 (Bitcoin): anchored in block 957830 (2026-07-13T09:15:55Z), 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/QZHNB2439465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4c1b47ed2c96a671fe23ea367fc42a69f206b8da32c7ca782a9de0ac756ea9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZZ772436418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16353d050255afad5c94ba4af37333927d78be174523507aab866517002e4070. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ772449791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b39ea066af21212773c2a57285040b93a492e09a5fde87fdb80ff51e960124. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ772449792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0d29f9259eb7ece911e1d98ae6c7fb09793ec35a98042b3708781ccff0b4f4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZZ7S2472098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bc3c0bf000f3e62a5141ac850233e8181164f40669be37c8e1e775c5fb9622. 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/CH7811114978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7f9e39b57c2e0e671f236e594b472a2faf9e7f0a45dbdb64315c5ca0be564e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZWFF2539545.
Cell Therapy (Who's That Peepin In My Window)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62520b3bbeda27d8080524087224020ceadbfec030861399b10050ff858dbb07. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUYG1551239.