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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4fd24881c5cb4000301c0169203bf2535ac828197ad9ae15c9663b50bf7798. 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/a649a389-d377-44f7-9d95-c331cbe03875.json and https://artists.proofprofile.net/proofs/artist/a649a389-d377-44f7-9d95-c331cbe03875.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cee9bddc62344ff7326a31e00c53222d0c0407a90f72afd77d79e4a2d147e22. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TWB019900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf351abea02369bc5dcdcef76af7b222c5f464c30afe4db584f8406b549632f5c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TWB019700708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631c6a61499956d50eabd38f7ac7e835ac9a725d8f70ec873da34e0816f1531. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:43Z), 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/TWA211459101.
不憂傷的愛(電視劇《涼生，我們可不可以不憂傷》片頭曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc65dc9b0f11dfb9484b80f833ab3bf8c582b65bd16bc64345db9f9ed63925b6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TWEG51800001.
嘿，你還好嗎 (電視劇《我在未來等你》人生主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1072461d412d7f0a730aecc9cb5f90ea32ba48b99605ba2cce548f29845916. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:00Z), 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/TWD252051397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad5e29774eaab80f35a80700b938008b4e21e0d66c9333c18a764122d15bcd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TWEG51900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b709edbb30fda5744e38068ab973d0a4fd697b5fcc4ada0af1ff28ac1824a0. 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/TWCT51719538.