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 0x690bcbc5008c92b7bc418ccac9260f443cfc52ed182142e272dce7dbfc7576d9. 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/06355250-f55b-42c0-bb7f-43f488b61f43.json and https://artists.proofprofile.net/proofs/artist/06355250-f55b-42c0-bb7f-43f488b61f43.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 0x63dc0dda2d6bed7bdcdaa0e4262a093142e9222dd0055d5cc077afc184af3e0a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA052068246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589f5e8315c2b2b3866da7694b0eb67e39eb61c69f2ecab066228c98549d9a0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA052068249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3c05cae5083bb36af8c1db51465cde2c9a0b407c3dfe4bb81c8ba62ebbfb62. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX762104835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1730c5bcd92a6d86525eca97607d099e43597e2954d00ee8395c112b448dff. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DGA0Q2386155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf518b68de268e8fd58ec6ef91c21774f28918643a0bf262729ed7d192a648993. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0Q2386157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c06acccf2d2747b152b132ea04f54c1e9b3270e2c694a6ccd623651ab01a0. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DGA052068245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48704ae6e7b8135b663ce8869f72788efbc706347f5055d1669ff186128c492f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA052068248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6085b068992389f7281f403357acda086a565bbbd2e1b9007df4041fdd2a7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052068250.
Ai Nói Rằng Cười Là Hạnh Phúc (feat. Akira Phan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b201829be04df1fd06c3ec637c9ca023c7a13b19859f05ffde3bdbf9778de0b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA052068253.
Tôi Yêu Kiêu Sa Và Đơn Sơ (feat. Akira Phan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d14dab8932e0176b85c0acf52751acd6bce97b3dcc63e225eb070faa2184057. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA052068254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0153534d4ef68271aa83918f5ebc8538086363433d0dd2aad8fbd9b18a49e6bd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA1M2404442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972c57c67734a342d829462b91e90dd22f4ce7e200068f2d0da5d961ade741e1. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/VNA1M2405329.
Medley: Sao Mình Chưa Nắm Tay Nhau / Siêu Cô Đơn (BD Remix)
Medley: Sao Mình Chưa Nắm Tay Nhau / Siêu Cô Đơn - BD Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41355ae5611e98de549702e1491a4bdb4ed96c8a81f126f1706f84f441eab8bb. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/VNA1M2405826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df14853d5a041da9a46a25d3ad3d398d04a334b6f4e07dcabe2483d4338c094. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/VNA1M2406539.
Sao Mình Chưa Nắm Tay Nhau (Remix & Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1a648b6b34eaccb1ef2287cfee8db39a9f39a5808f00632cf589bc66e335d4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0R2502964.