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 0x990b2c5559ff4c992cd7ce38cfa796f5dccc0c9475eb03827c253a05d165b16e. 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/cb616ce1-198c-4047-a0e6-6bfe874c9a8f.json and https://artists.proofprofile.net/proofs/artist/cb616ce1-198c-4047-a0e6-6bfe874c9a8f.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 0xa31faf34ad8715300d3d87012260d84509fad1c84ae556f93e98a92f1584bf34. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/USHM81496093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69bce1bc69dfe9d71cc9a2667aa2076ed07bcfa14eefb3902a6a8ca96824451. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USHM81496105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18536bdd5466e1a6e576e88679802b08c79ba0e46648d278074039951f5b6d21. 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/QZTGW2100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac24edffc132ae83db51a9e3115f8cdd162b903d3f8c80554f6e572c4ad11404. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/CA5KR0015118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4840e3fb79b22036c21ba83bdeaddb318602f7a47dc1a535c018392ba58a7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2336292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddd544fe0d27d3623b543808ab071efa7e1627deebb122cfd91677ac1dfa0c2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWV2311500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3842419f8bcb150ae52eeb6cabcc3413056fbd5d1f7003ac9dd9f284b8f0d9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTAW2336461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3842419f8bcb150ae52eeb6cabcc3413056fbd5d1f7003ac9dd9f284b8f0d9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTAW2336461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb760ef6872f786714d274c0853ab2ba21193d03539d0e3cb343d8d8175f37179. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA62469394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09810fe44041eddd47c7a88c00ecb8837d5d4cb892bc832d9173d19be619c17. 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/USUYG1511320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09810fe44041eddd47c7a88c00ecb8837d5d4cb892bc832d9173d19be619c17. 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/USUYG1511320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42949bc8ce9d4bbf85e9040f2ec76858091957f51c152ff88246959019becce. 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/USUYG1381166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf755334ee3d22d7c552c9efd3b069415d72ade36a8e1266cb3cd3df19da25a2c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUYG1302209.
On My Set (Remix) [feat. Yg, Big Quis & Hunyae]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd260317e04a77ee23d7ea64531bc87ba4c72d01e7f8b6784be2c3ce3a3685d8e. 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/TCACD1553392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558d1429f0185315d9d8a1982787e1bc4585253884bbc14beb7a66b443516da. 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/QZMEN2295486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ee0389f4d3d2cae9e195505cd15019a1bfc695d3eac6b7490a6c9a1315d6f8. 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/QZNWQ2252094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0f714cdf258a41d22b7903912b1fb1fa5dce65cb8831ed99a60b1e19bff3d. 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/QZMEN2295487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed8e870c5701d2a145ce97cbf5414602c543b461a7bedfb6d446db4f1b0c26c. 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/QZMEN2295489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe51a68e05f40dc30b32e23852738f96d6ec5650f526d02ed586d7e576bf2f15. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZMEN2295491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7188005e726352606cd9a0e7c1d4daaf7fcda33672be325cf20dedf02bf85bda. 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/QZNWQ2252095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa0b5c95c4ab03d2078de84d0f95e868ab4597fd99dfb2e27a348996b028766. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZNWQ2252096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc1bdc8d395cb4cae4e1e5ee0f3ab464f766d5d6da6606312d93003574706f1. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZMEN2295490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6719dfc767cfa457d3b392880121d7250e0316d24e4224418d511ac809f628e. 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/QZMEN2295488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c7232435c45f663557b40795fbe8b97d017ecdfef5dd5ac4b45b9077149a7d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNWQ2252097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdc7772a2f1a8bcaa18d6b59306a9d7bbeb750cdb2b12629c6d11d82cc15788. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZMEN2295492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c9f3dc91a2609c11abc1ee15a82b3ddafc74b1abf84a2efbb9745de45bf91a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZNWQ2252098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7558d1429f0185315d9d8a1982787e1bc4585253884bbc14beb7a66b443516da. 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/QZMEN2295486.