Ngọc Sơn may refer to several commune-level subdivisions in Vietnam, including: Ngọc Sơn, Haiphong, a ward of Kiến An District Ngọc Sơn, Đô Lương, a commune of Đô Lương District in Nghệ An Province N
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 0x0458ed6fc3a33bda6e17b726d94798914352b0b7bb00b081f2021442eb936fdc. 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/a5f17755-8328-4f80-83bf-30cccd411ec4.json and https://artists.proofprofile.net/proofs/artist/a5f17755-8328-4f80-83bf-30cccd411ec4.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 0x2474399b5ded72b898c14d153afbfdc2bb2c0fa8c9ba083bf612d5f432d654e8. 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/VNA0F2305203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d1a0e560afa00c4d740c3df228b335ff3f6232969cc4fb84029f3fd2b7e78. 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/VNA0F2305206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5cc88eeef283af1c868d29f5e8eb1b77457d44bd7c0c93dd02ca27ec15817d. 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/VNA0F2307515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462ab6a5863db69dd400dc8fd39877a7004a43c664c6becbb9687a00620aa416. 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/VNA2B2200609.
Ngọc Sơn & Những Học Trò Thần Tượng Bolero
Danh Ca Ngọc Sơn Và Học Trò Thần Tượng Bolero 3
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed824dc819255e590b63bbd8f973ba8615f86dc3569f28c11efa7ac4420720eb. 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/VNA0M1829401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2dd29383baaf767cbdd8cddd3c444b70e8ea58703d2ecc1c5c215583cd0cb0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/VNA0M1829402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055d623c6290bd4f0cad247be76259c6d3d7314bff9fa7f407205c2605602d8b. 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/VNA0M1829403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c96a5e8f6602705559495186a3b0dae12bdbb8427ec5417fadb3f6ee6b08ac. 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/VNA0M1829404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f85310a96a6987b86b3c1a0ef91894a25c08bc9285762cab1f13be6a7ed8c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/VNA0M1829405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5984e956dfffc956e538881ade8f1f9d03fafec428ae526cb5103f3f1c96ca. 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/VNA0M1829407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282535862023258f8931fbbeb0d54839e8f28397e66699f6f0c8ff0f59b66687. 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/VNA0M1829408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133ae819ba9ccf2aef458b67801fabfa29d1e7c65f7f74e975be4ac473c3da0f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/VNA0M1829400.
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 0x0cdd98aa8c9e0e07c990c32c976eab7ff7e4ab0016c031fc18feae3b7c000d94. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/VNA0M1829406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da1417092d2bcf1f9a72a6039044570d2125fc43d934e783826e266e15cbc6f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/VNA0M1829409.