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 0xc0c9d9cb952a284e0d0940707e8d94e20190a2e7f3cf2627b53a4ad2aa645d5b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70ff3bdc-aaf7-4a48-9a2a-dcf329275dba.json and https://artists.proofprofile.net/proofs/artist/70ff3bdc-aaf7-4a48-9a2a-dcf329275dba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Thương Thì Thôi (Lofi Ver.) (Feat. MeeMedia)
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 0x98cc10fcfe2f1d083c3690da4788f4d21989d7c997ebcceb63e25295944eb9e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRB922430514.
Thương Thì Thôi (Remix Ver.) (Feat. MeeMedia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a340fd5f558b126a9db7f2345247ad08e22fe6086639f3ffbf611865a6294. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/KRB922430517.
Thương Thì Thôi (Remix Ver.) (Feat. DJ Lucy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad546bcd6e01f1b34817767307e02fdf32eb7cccbe7350689c878f18ce366fb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:34:48Z), 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/KRB922430518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bc1386b9a43af41671b32ba580ec1f30961c7405cb8d0741be233fcff157c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNA2F2301900.