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 0xfa2d4dd8e67012a235f033ccb08749ee6bde172772e2e79966a48865cd153a48. 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/07d1a9ea-9de6-4674-b080-accfb6604b9e.json and https://artists.proofprofile.net/proofs/artist/07d1a9ea-9de6-4674-b080-accfb6604b9e.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 0x88ece2822a9412f99fa266c2fc9fce65f89f37b1302234579160a8f5931e4364. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM4TW1874813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2dcb7cc58921153354f4445e169a64dfcddd3807d4cfffb82972d0e5134798. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/VNA0M1850371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d71fbd7d780588a1a40cb08edab75149da04fb13f119c33a11fbf1ce74a4fb. 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/VNA0M1850377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55d0015231685e1c34d4acca566f8571cf1545f8275e629503a9b0453e758ff. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/VNA0M1850385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c873ed1b656fbf6f60d1de5e45abef5498acdfc04cab90c1d66de1792e131c. 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/QMDA72287737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe237abe683796a67ff40bfb845e7d7ceaa6f55f7bdf478f3a07ea33b9590fb. 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/QM4TX2472368.
Kết Thúc Một Cuộc Tình (Phi Nguyễn Remix)
Kết Thúc Một Cuộc Tình (Ballad Collection)
Yêu Đậm Sâu Có Chắc Bền Lâu (AB One Vina House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c077f5358c69fdcb4aaf90b37621e53b3a9fd6e6a614569c7223e46e4e3075c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/FRX202258406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4c81de67b266d598475a4ef8da812f7efc96f4cc74eb326247b115dba1680a. 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/FRX202258410.
Quên Cách Yêu Thay Cách Nhớ (Instrumental)
Người Đổi Thay (feat. H2O Vina & TOPKN) [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dbed31af74fd752079f8e38f8e3ede7da3d6372c98aec00a6fe6409d3d6719. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZYHM2507158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ea256ac21d407678e7ece812d13fec38599498fa55cda87cdd40e7d8007e40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARC572402402.