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 0xb87fc990e658daf069f3b607f3909fd3339daa946a6b6eac3b16b6d0d6c7437e. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b04a7b5-3e5c-4a4f-b9c1-7cb41f7172ac.json and https://artists.proofprofile.net/proofs/artist/4b04a7b5-3e5c-4a4f-b9c1-7cb41f7172ac.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 0x5573928b64fa4347a526f0fa34fed3a0e88122cfae0230eec413e522e1e1a211. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA52371457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a7b905e99a03d7e0af921267fc086e60c0113bcbc56134fcc7f4753ac82e70. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:37Z), 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/QZHNC2370706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc165c041deb95d5bd4f50c601c1359868a79efe720fb4c4d4ab789ddf222cf4b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:34Z), 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/QZNWZ2383261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a6325eb18695c646488908ebb5eb5ba02890278f47e0e2da56254d1e4cbbc4. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTBD2334260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa005833a45d58550d27d68d0cf5574b0fd3843ac24faaab5a1d261c8f05552b9. 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/QZDA52476209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89053020001bcef2c36a3be7941e63969820dcb3ad72ca31e697abe181b730be. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZTAY2456601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27219bcd526601c260a63483f0bf4f16256a94ee7264af6ab6a87fad51ca5d26. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTBD2404585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce6ed2d12558d1bce04c91311b82ffe4a04b270c9e645a5208e2d29f18b068d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:10Z), 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/QZWFH2443963.