1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xf3e730d705871248c97dc4fcebdab806bd6a7d160728ceb46ccd9494e20df7f8. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ff7a5dc-36b3-4871-a3e0-29806f3eab82.json and https://artists.proofprofile.net/proofs/artist/9ff7a5dc-36b3-4871-a3e0-29806f3eab82.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 → block OTSBitcoinBlock must exist at that height 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 0xb09ec8913725d8d5263db82c37487e26fe5b8537614e943c76ed5be84875684b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAJX9138929.
Singing the Night Among Fishing Boats (Arr. Tong)
The Marriage of Chan Xian-Yuen (Arr. Lin)
Moonlight over the Spring River (Arr. Tong)
Bamboo Flute Song from the Village (Arr. Lam)
Variations on Yang City Tune (Arr. Tong)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faaab0bdfe0b3c4170b007aff04acc0a10b449873e5141486151cb70c599135. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAJX8736811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781ee99292fe24bef5916eb16e0383f9df3395d35c19c5b3912c05a4a3b75972. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAJX8132501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a5ec74f606b2d7f06f4df994e61d8ccc60c55bc8f59391c6bf593bc3475c4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJX8132503.