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 0x8a0e1d153cb09673341e95c3ef2bcc6d2571990a608fcb2de649e718298dd3b4. 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/b789f39f-213e-4ec8-82bc-20600ead305a.json and https://artists.proofprofile.net/proofs/artist/b789f39f-213e-4ec8-82bc-20600ead305a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Viet Nhac - Ngay Mai - Buon Ma Thuot - Bang Cuong
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 0xf596aef4ef1da2667c3db5ca679b39078d16f685f9c4b638985262b1e9e20b93. 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/VNA0F1796754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266a7e6f775b4955f6c272b73f6b3d5e2b0174fdc2b339ebad50e55583bcb670. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/VNA0F1796825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f0576e76728d644739bf76c2d1b9ec8d534e45a9595fa01208e5c32a5df4a8. 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/VNA0F1796672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2603e8febe682d0facc8bdeb2222919d0333c984e5cb8c79f84d68640a9d9f4c. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/VNA0F1796784.
Tuyển tập Bằng Cường & Giáng Tiên (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776d109857c775121659c9eaf9a0f914ea0129b27fd69677d5a1959e09d669aa. 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/VNA0M1909992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefee23fefc77df97d5d429c6380444402ab5ff308df4bde50c5ffe397c2b092a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/VNA0M1924139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18020cbd34209f6cd6e301403dce620cb9073f62b5d331ea114a82abcbbaab96. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QM4TW2391877.
The Best Of Bằng Cường Vol 3 (Version Piano)
The Best Of Bằng Cường Vol 1 (Version Piano)
The Best Of Bằng Cường Vol 2 (Version Piano)
The Best Of Bằng Cường Vol 4 (Version Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f25cdacd7155c071dc8c79fd70deb1249761c52422df8a1761be22747df8ec7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/VNA0F2310239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685d88a96705de5649f44c7000e6ef42574292aee3446568e71fc1b70931a47a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DGA0M2499941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080665d5065c798e7c4f4e2b0e81c1d0215253a34ad71cf3f8c650ce82035a14. 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/DGA0M2499942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e2c91d41d5c11279a136a2132b0fb9a1afdac96f5c4b6a6794652b1f7bdeaa. 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/VNA0M1845697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0caf6b54a98872e0c93fb4eec9bb1508c52c17d7284293e550f66a882152ea. 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/VNA0M1845594.