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 0x4d6f93d7addcfdc519fe3a8ddf88bfc04550c165a1d360d4954eb43a5cc44c86. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55b141d5-5362-4cc6-b1e3-e29048ae4dde.json and https://artists.proofprofile.net/proofs/artist/55b141d5-5362-4cc6-b1e3-e29048ae4dde.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 0x61efd181e6637a729bc29356f7cbcce484fb709e89d7735336a3912adb222f0e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282318753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8293c2402fc4a68fc24666ea426825aef47dd7b8fee2e5e9585dc2b0369acfd. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX282318755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b117c3a4cdff0574e5e721d3d5a6f6fe2b8c94bbbbdac6fb9fa3db98febc07. 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/DGA0H2495683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a99c7ed05f7e3066cf3f6da6c2ba15bd9a4ed2f20bf9a7169dee93517ad9f90. 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/DGA0H2495684.
LIVE CONCERT KỶ NIỆM 25 NĂM CA HÁT (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6a9511a4a61eed3338ab233212c43c612c05e1f4f1a964c812b26ce6dbfa3. 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/VNA0M1834274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63967cb96d2a484b109aedcb3a10db8bdb9c9f7eb6b64558a59cadee7f758b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/VNA0M1834273.
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 0xe1ecb1a6a727583411c7bfa77bda114f56eebf5120137e6146584cbf784aefe3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/VNA0M1804429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f76fd2dbb40b0ef7a1d9587d05e023716514c9357d822288373420523b68ad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/VNA0M1804236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf9e4b5f699987c41d219b668b5982512b6054a04788b959a63583e550b760f. 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/DGA0L2422751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee03b31c763ca41261c773bc116c727540220f091bc5ef9ae7c9a6da65d0c7e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0L2463647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e9fca42e237aeda5e930151bcbb1ec20b51ae566ec0bd5c504eb7deca7f4e7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DGA0L2463648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e107510a9f6b8e7753b89440ffe5a947085220d0f5fe0aa79d809f34bde5bdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0L2463650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6824505805e3cbaeee6f0dfc2e8df9be3100f641e432a57a8cc9abd5e9128e6. 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/DGA0L2463652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bad1cc03a395e13a106d22129bc588290637c2852db0cbef39016b43a46d57e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0L2463656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdfbc2d60c50458c51125aca991de61281a7d5807d511696e49b8befdc25df1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0L2463658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5197b17a28883881479424adca323af057f51c4a8ee1bf9c0e73ea0314fb8559. 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/DGA0L2463660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9405acf3447b731568f976e75923fc44d9f066e445927349f17f7cc3f0e783. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA0L2463657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f73c92274dfa19e4a3679ec7e23af2c3da4dc0092d27e2ad8e79f0d773bbd8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DGA0L2463659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c19f101ceafc7d4f0ef7fbdc3e5b75884f1cda5224edf270b6703aab39e5e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0H2495670.
Ca Nhạc Kịch Cải Lương: Chuyện Tình Lan Và Điệp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ed85fc5b31da3208f07e919ac863784f92b0f2db1be022b38d065d0e04825. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR96X2335139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c564cc8cbcc4e22abab9248f345efc5da3e780674e186851ee1d0ed391273. 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/FR96X2335140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3267e6d0ffb28ff05ee64a1112fa6cd9255347437493baef36edce39e8aa4513. 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/FR96X2335141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a361d7a5927a7503a0272b6d9eb14775de425457e89313bf9aaa5a1f972f8a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X2335143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f0ece2dd1f5b30036361035f8d39b2f88cdae4728e8827fc85160d64b5e68f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR96X2335147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c59a3329ee90844ba3a806fe15530178099f1206da865991b350845cbb91f7. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR96X2335138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee218da325c76f0a83f79c840b3ae70fe818606e2a3f61231f0c2c8b69e6afe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR96X2335142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ea4675e9b9acb5880910d25599fc1cf043e9644525378a845197ca2a18f576. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR96X2335144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0f4e83ec65a46928db01f7890d14962ddb83e900be247826af48efbaaa9e0f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR96X2335145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4adedf3dda10bf622ec0e39b85a1de48e61c8e0aeea042c5580d26f93a8adc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR96X2335146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa884789e927f621ab1e0c510a00924fff5c9c277cdb00b59334c19f70281506. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FR96X2335148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fcc1ab9482a6cfacd10b71428738c84b89f3cee728ad5aa555a4a8e85c3a46. 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/DGA0M2490181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c918666cee3afe3e5ecfb4ff59893666499fac7df2bda4f542cc0ed0828013. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA0M2490183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54960cf25b796846dc0c91936afb5ecacebd94b1539000d1326f8c60a029fcb. 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/DGA0L2457773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8f36004dec48c7c6245db9491c6a8667a66c915dc7c5baa63e1a17a9f488af. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DGA0L2457776.