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 0xeb8307f4a7b641b24d1ecb551581e0e4b878b470131160ffc3300b129fdcd822. 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/bee1cb1d-fa70-4482-a137-db16b7bd9f50.json and https://artists.proofprofile.net/proofs/artist/bee1cb1d-fa70-4482-a137-db16b7bd9f50.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 0xe1b10f23b9c7b9cb7cf3cfc17de749d4590027f824a493f779d4dd482b17dbe5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2252999.
Một Lần Thương Vương Cả Đời (feat. 5Mon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67fc2df31142cc1b2831d75646f743279807626a38a8126fb864e0915e93747. 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/VNA0M1909632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277b5b869ef6b72db5a6ba61105c0ebb9540dc717ff13b2b97c521cf5306ded6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2298261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c15dbcd77896c4d9b207d31f6003ce228fb219f5093ccf9185ac0886d5a9ec. 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/QMFME2294621.
Ngàn Yêu Thương Về Đâu - Thời Không Sai Lệch (Lofi Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558118f4cc74faf79e875316e9c45fb684ec8947afd20b9c14ed93678b177148. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QMFME2294253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d3d99409439c6476c165a12be8978da6fdaf93ca385729961e7091ffceb3c2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QMFME2288595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41da69bdbc1cb20b3667048445db87fe5ea43b4c171c586348a2de9febc58106. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QMFME2262688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548cd6432a3c2a62abe5c756aac357c16d9cd0c3dab2d24325637b47fc7a37d. 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/QMFME2262369.
Từ Chối Rất Nhiều Lời Tỏ Tình (Chill Version)
Thứ Quý Giá Nhất Anh Mong Chờ (Acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dea7ec4d300679c80565cd154d356ec2d3728f70ac673a7ee06d769afe6fd1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/VNA2E2311113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ba0c8b4c36cf9448f5687247cb33d285e3c7e07a9bd71cbe3e7a41e0976f42. 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/QMBZ92352564.
Thứ Quý Giá Nhất Anh Mong Chờ (Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958d6987d8ab802b6b1de537e168fea40a33bbde6d6b887a8c0a1f19ef8cd895. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QM6P42423313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707bb954bf82c5f7dc8b76dd82a5b0df56d49672645d0bbbdb2cf0e377346e7c. 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/US38Y2419770.
Cảm Ơn Vì Đã Không Cùng Nhau (Huy PT Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd36fc6158a2ec31c5b5a6f1ebd5ee8bf6aedae177a2834c28f4446802187f6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZYHM2373759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277071d8b41497fb23c58f8fe27516bb2fd8af0f47caa029cbcafa075777301c. 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/QZNJV2558441.
Mashup Remix Chỉ Muốn Bên Em Lúc Này & Kẻ Phù Dâu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fbb54dc4adb30636dfbb0425d25e4b4e8b9cb50f502ee129cc52d1340f1f3a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNJW2585038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3cd19cf0d97d1affa98dd571f7caff96d210c0018d50cdb012659fed7afbdd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US39N2535650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf6e0459f4969ec592023f9db3bef0c8bce330260863cbb3ddea5e8dbefd734. 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/FR10S2184934.