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 0x2ebf07730795f0d63138bd87e4082b32e00a23ee81b41f7be7f4ad7ae315f732. 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/24b222ee-e6e1-47f1-aeee-24bc3003d9ac.json and https://artists.proofprofile.net/proofs/artist/24b222ee-e6e1-47f1-aeee-24bc3003d9ac.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3fe9da6b97fe007fdaf5398e40c7608ff7dc43aa17be9247e3b9d3de57394c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/VNA0M1914387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6786e283cceaac357f8fe6e2d05cc01263f02c69d71e230b1b84114f0b82f4. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/VNA0M1925806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda89a29c6e4b76803a44d04b9f38d768b296127258190ec839d8690600bc1eb8. 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/VNA092201584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f79371de2ae5e00cf2bda3fd8898d71d448c1a6a1ce564b35278e46b2b0129. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA2E2210172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1d58c26e699aa988c354cbd192cead808540478bac2f8d0887057f66e212d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/VNA2E2312388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3733681ac38af4b002973dfff7407a36adf8a7321d1ede5dd96af22dfd1372d. 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/VNA2F2301749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea980f241cadf6c9729a82f778dfc83a73046d0cff2abb8bbf96ce1f2ae3f684. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA2F2301750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7ed78b12b0a6425d22d39f81f3b9e6d17040621055f697ad5bade8afa0b0b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/VNA2F2301751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce884ac2c95d7f68417322b5c59005212476c0735f20884fef0f4cb70539b73a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA2F2301752.
Chuyện Của Chúng Ta Sau Này, THẾ LÀ CHẾT RỒI (Live at ZLAB)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587a8e456c1807afc1f12ec4f7b5506a51bd4193cc66b56da3357cf99d0ed6cf. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/VNA2F2400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d7da45d6d0050c68cd1bd92cab18c6d20f4a08cbe9eca6531ab962a981b8d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA2F2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06912f2ea559141069208f2be7ba28316edd26f4ebeae67c719093606ec5fa8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/VNA0R2400041.
NGƯỜI TÌNH CỦA NẮNG (feat. Anh Tú, Captain, Hải Đăng Doo, Vũ Thịnh & LyLy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b0bf6e28072fd01f731e2bb288cda6d2ded3520c566837306f5298a8ccb0c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2419536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b0bf6e28072fd01f731e2bb288cda6d2ded3520c566837306f5298a8ccb0c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2419536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20f9effd1e4aaadc79ccbfa877a6a8a5d0bd807a562d5ea9559366522b2190c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2504849.