Khổng Tú Quỳnh (born November 22, 1991) is a Vietnamese singerTôi và Khổng Tú Quỳnh, thân ai người nấy lo known for pop genre songs like "Tiệm Bánh Dâu Tây" (Strawberry Cake Shop) and "Lạnh" (Cold).
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 0x5b749297b506a948dad1b5b83ae313a08f8cdd0f57c3998f2cc129314f5e6071. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f56c19db-6b76-480c-b33c-3b54d6396f0c.json and https://artists.proofprofile.net/proofs/artist/f56c19db-6b76-480c-b33c-3b54d6396f0c.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 0x9b3f370d2b6fa32c1c1a025a870502733b9b8813fa0617e1778664b95e986e9d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/VNA0M1802837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43ebbac0a93237fc9817d09909ff786cf18278360887f9465d55c4637f60e63. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/VNA0M1802839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3f370d2b6fa32c1c1a025a870502733b9b8813fa0617e1778664b95e986e9d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:17:29Z), 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/VNA0M1802837.
Sẽ Không Ngốc Nữa (feat. Binz) [STee & Saki Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526523171b90a14cf9fb1e6d5e338c926167cbc7d8a7905a60357459d9ddec18. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/VNA0M1847316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5683073528267fb82def3e58c25bbd93a4380f65293f82f2bc3fdeeba095b4ea. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:41:23Z), 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/VNA0M1847325.
Mashup Đừng Cố Níu Kéo, Đến Đây Thôi Chia Tay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82feb5c0e904f42e5642c4549aaaeb73e925f8634a6fd50b82fa80386d432b37. 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/QM4TX2471380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a78f80e061d4d7afbafc66a207835623eb77895ae1cba5e69074ca8c4000077. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZN882290779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310387a920941716a14c034161731eb4ea3d3ee97502027ce4bea219392df8b4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR2X42483707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab4d652024e6f4b3e92934f1d5b882e005be01d5ab00d06ea8c96eb8ed2814. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR2X42483713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515821cf2dab3c43c4f0573cae7ee229f054b1e96ccd4c55eef06e3ea3cd3686. 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/SGUM72301560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dc4a49aac99a30c6dceabec64874bbf8d6dd383273c40c1bc47696c82edf23. 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/FR10S2510077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcced81d51d0be888367e1d2d21cc94c62a4f587e67fe202f56d58502eb9c68c9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRX282113117.
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
Gala Nhạc Việt 5: Xuân Đất Việt, Tết Quê Hương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39017416deb966607986db13604c085502317d744107f925eb36bb9c602a98. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRX282113055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f40c407282957fe97e2e1251dce91cdcb701e0c79bb5370a04c3baac2cfe63. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX282113064.