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 0xaec2d9bc8e2cecccb8bb4a595225436bdce2d5a9b45460b512729465f0bb3a01. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c338881e-3c9d-46cf-a166-f6cb71083d00.json and https://artists.proofprofile.net/proofs/artist/c338881e-3c9d-46cf-a166-f6cb71083d00.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 0xe4505bcb9d8bfbec07df8c094d66d32030217b8fad67eeba29784cf5b7014595. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMER2431904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb4695f8710d7a17dcfab6214f1d07abdcc733cc19b9b6f9af71b49a8f5fcee. 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/QZNWQ2463883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4b8d48f5ff8a8d4cdf98a505284a065bccc8dc96a26856cfb6a6fca2502c26. 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/QZNWR2414659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a6799c6d00451adf17a6ad07d58616cda5c9410e8a9b4d80772b0053b90c8c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:34:02Z), 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/QZNWS2418033.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5102c6ff988bb4b70896a687751f84f6454c9259cc9662675be3920a9c1f38ae. 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/QZWFV2571901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d1165d16ecb1e764d23ea00d608c551a28013962a8c78beff3ce5c39565e49. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:27Z), 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/QZWFV2569728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b47e8cf559c95828f32bbff62d8426057fcf92d4499bb3823e402fb4d372ac8. 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/QZZ7P2526728.