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 0xc3eacd35493bbcc02a1e10cad0bfe1e3ce718f2cfdc2f3dd5ce34d1fa8b7e275. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21b60c3c-02c7-4dcd-a564-6aec4a39cf56.json and https://artists.proofprofile.net/proofs/artist/21b60c3c-02c7-4dcd-a564-6aec4a39cf56.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 0x68e01e976ff16265fd375a41b6e181cf21bbb7fc8f373a29ccbd7126261b2d88. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GXHAF2593595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f38a230b454ba0e91b0dbae2f7975cb1f4bd075506d19872d6cb35766aa5f0. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:29Z), 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/GXHAF2593602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7673615912b837af5a237e2be8801bb6f723163ea0089cbeda579f7387a06f. 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/GXHAF2593616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1887f38e20fc7e3fc9e9f344c2ed6d94593063328091281b0caa6b666ae29fcb. 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/GXHAF2593556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa998a00e6363d0c62b42805f4ee47afa839c1346237a890c645a1d05d4b924ba. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:29:18Z), 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/GXHAF2593557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccf3c833af63c60713689c1db98efa3553b610cbf6be13ea9a2ab271ea44ad0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:22:25Z), 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/GXHAF2593562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0261f3123327274c8b2e556c4a216bd634ce49edaea0de2810a8b17afe3564d8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GXHAF2593572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad011926a3b2bcd11b3e382d76b3f69eec54e29879701d40cbb5194d0218a3e1. 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/GXHAF2593578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f851a5fd3e7978848171c07454121420d2daf1402927bbad6d5e4728ac6b32e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GXHAF2599253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8592a48988810ce9bdae7647a09fe284c60d4a9ea2f64798a20b165ef7594aa. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:54Z), 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/GXHAF2599257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db52c1d6c969e9b0f3441c799441271a8d6a0c21c7c8074cd4d2f24d046e3b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GXHAF2599262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2d65af840c1eeda64391988a075ff98eb85e4f0eddff6ee57cf3b7888c5e90. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHAF2599267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1d4b9cc82ed11e0c183e623662292e9fc73c159f374ea237432be0e6120d94. 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/GXHAF2599276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80a23627713131fa50148faea362765738d5a280f31b0a1fd25d82d8cec92a4. 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/GXHAF2599277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5824332042714d90b40848b2169beef194debdd24199fbc694b874cad7d4a44e. 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/GXHAF2599278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f50a69364a4a90377f11cc1aca2c6ece9cd9f056fab439aa2325fb303889c52. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXHAF2599280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b2866f97c933d428e63ed32c270f111aafa8a35ec51dec169a2db293e7714c. 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/GXHAF2599281.