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 0xddd261103c0345919de23bff23b4f4e5bfedc633ed293e39dd1e36e671cbb94a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0fcc2d9-ebd5-468d-811f-f3e23f140fc0.json and https://artists.proofprofile.net/proofs/artist/c0fcc2d9-ebd5-468d-811f-f3e23f140fc0.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 0xc8ca3914812e882595c0bd37b2d52d7ff1c7c3927001b64acc0b3e7f7cfc430f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN92149473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67b217f656edb97b55141befa9e393396e1213c1da3057fb9e641fa9b3c6cad. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92149476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0db88ab27c9f4815ac6bc2303f791481e0946d7f3bd25d05f55ffd87c291a3f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZK6L2134623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47a7c6c9438208f6e4ecba059ddff89248ccb851192023296b09a7c6c2849c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:47Z), 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/QZK6L2134624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6cdb3602b5d505c58106d8c2b0c7d3ab2fbbdb7da9b1b768bbd22c24099283. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6L2134625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f538d25b8f9ce454b467881764e242990bdc9573f26b19f1a9ce53eb8192eb6. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZK6L2134626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f93263678218788ec7882d932b88b6c4c46fbac8732b61f4d8fedad90af562. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2165980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796e225eec628c8019f997f2a9b38ba23c710c606fb6302c7b4d47210626c971. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMEP2165981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810b1f343b357415d63e67e0206ffa38c9c210a7f923c0c5f07d60a0ab7e8643. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:14Z), 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/QZMEP2165982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79167acbed476d3bef10200951e0f72478b8ce0a1953f6526c1219290d59d713. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2165983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4791a9b4d4138cc78d01a1048d239d97ad565de3870befcdcdcec4f4612048a6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWV2130091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9be067b948c7b071bf65374ed9c140293c019d1d8df53ab7936fb1f8d6979e. 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/QZNWV2130093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ed7c708c62fc24b896849d93d7b582409aaed51418dc24a198684348069ac. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZNWV2130094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f87c2574c4b702546144d70eb319c09a36e20cbe743868a417cc99ef18f9994. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:41:37Z), 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/QZNWV2130095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d0893e089f8110916cb69720d5c129bc66467852f63f442305e16b93097577. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZDA82268711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd3268c3e2b9a918ad96c12f4a86ef65d992cb3c8848f5b09e51a859a5fe6a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZES62261633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc320df5056eae3248eec6d271e090e54d94ecbe695556e171c5993b273132a. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZHN32257980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd523eb0b433ac6e9bb8b58a0e333c15866c6358b84bfab0b8b21c46e27188636. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNC2270547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2e717fe7f2b62b32c2d3c5ee5996acd7b0f4006b7a606055bce696cf7120fb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZK6K2218293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a2e88bc6576d2094007fa377277e90a0ea093cbc60195174e981e54776b16a. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZPLR2244635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f3363f2b105005a10912982ac52057e259eb81197653a5dc6ed77614d9a23. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42402431.