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 0x7017501975121626aec86e6cf29e16bb745836d62455f35a4a4423264c48b023. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00bfc0ab-be10-4527-af6b-289fcbda20ae.json and https://artists.proofprofile.net/proofs/artist/00bfc0ab-be10-4527-af6b-289fcbda20ae.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 0x0577e394d1771c899a12d7ccf9654580244e55b107b3c1791990e6b492bcb341. 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/USUYG1561897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0767fcd27b997ce69faf540931e9977acc20cd4bdc66bcbe2df6b25c72ede. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUYG1564654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3669e9e91cc91f70c47f345e91b822164a72a4817c99cadeff78941191cc8. 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/USUYG1564655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886629045df3350c2eea7852acbead463a9e4d7a1e5fc2a82de2062cbfc0832a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUYG1563939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c76ae02721a7be54c43942e7c8bf02cb45af769535821d31b835ea81c9c626. 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/USUYG1564657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a613e02bad85649105528fb578c12f25831ad70c5afe7fa944f82d0cc44992. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/USUYG1564658.
What's The Difference (feat. Yhung T.O.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f2e6f66193f76b244a3b892f5fb901c1c426eea01e4693e68dda7ca3e7d0a. 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/USUYG1564659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b087e1873cc36b97a712a5b09884618dc0f16036bdc698b213fc74d87c79026. 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/USUYG1564660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a985bae978b6eb68e5a67164057675642794c29569c091b8bc8ac0005b9970a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USUYG1564661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5976ca0683545622ec3106e8fde4d650522acd279089f03bb803e379e4d1c13. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USUYG1564662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc165d20f1c3eddfd5caa97a38a9be867e0639e1e42fe520419c31b66725a79. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USUYG1564663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db5124dc6a4cc1396510c176df8cd101a964721464c4e4fe17c9eb3f79d2e1f. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USUYG1564664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2ebdbbf83ef26dffe88573b45a9aa3f1bb1ef8af00ea1850af422d294a1bec. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USUYG1564665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e798c2b2b3751013183584c972b57485192fdfb3aa29f961d0873b7bc64270c. 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/USUYG1564666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886629045df3350c2eea7852acbead463a9e4d7a1e5fc2a82de2062cbfc0832a. 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/USUYG1563939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0577e394d1771c899a12d7ccf9654580244e55b107b3c1791990e6b492bcb341. 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/USUYG1561897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3355d88c8afeada0f1094481dfc17bae3dcaf6c03f74d80f4de42600926eb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZFYZ2347305.