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 0xe527c02e4c9c1c6d2bee32a958f65d08c7f64c5f765648467f5b2707d3322a24. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34e649e2-5c39-47c9-904d-fffa898c3999.json and https://artists.proofprofile.net/proofs/artist/34e649e2-5c39-47c9-904d-fffa898c3999.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ACTĐM VinaHouse - Dunghoangpham x Thái Hoàng
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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 0xfcd4b7c8335e7cbe552b14e1ef9215690e97df04ca680b3cc8dfee3d0b9cccb5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:50:52Z), 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/QZ7782305470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21634145ea42ac2ec86c31781cad0168d06a339a5ef1ec000d6ff4d8f32ce78e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:06Z), 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/QT2VB2467363.