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 0x3b6c64340c43dfe7594ce42a03ff0547a8d37b34faa459b7bd971536cd5200e8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff24f631-c101-4d10-aa79-dd0e40d978a6.json and https://artists.proofprofile.net/proofs/artist/ff24f631-c101-4d10-aa79-dd0e40d978a6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cát Bụi Cuộc Đời (Chạm Mặt Giang Hồ Original Soundtrack)
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 0xf6d5568f8a4c4553cc2e6941156d80ce72300213b860641c4815e90bcfdac5c7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMDA72282072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8becee43492bfe4e28e73dcee9b8ac48440d2769b8af44001aebe53f73c5e061. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/VNA0F2011500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10274a4fe6d311c8792cf6e7111549774955c3d4c9a435354c43fed02c582456. 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/VNA0F2011630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b64c4efefd55fef3d1d3aecec134c28827b36dc4accb979d21386ae3fb3dfbe. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:34Z), 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/VNA0F2311593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c228ea06b45f6f873280727f28010c63d63b7f0d5d0229f9a6f3f9f4f342da1. 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/VNA0F2311590.