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 0x2bd89f403b96b01c585aaef69f6a982c34721c111bf53cd2ee1d5346cd9fdcd8. 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/3197644d-eb0b-4be1-9daa-a859db3ffefd.json and https://artists.proofprofile.net/proofs/artist/3197644d-eb0b-4be1-9daa-a859db3ffefd.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 0x9ebe907e31291f4b044c4436de4624f11fa80157d268b3d50e746f100a7dafd0. 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/QZNWV2002656.
Liên Khúc: Yêu Là Tha Thu - Đếm Ngày Xa Em
Gala Nhạc Việt 10: Những Ngày Khi Ta Còn Trẻ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e05720a0e2da0ebfcb10202a982a46b6ce570ecc50c3216aaddd289da68eef. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX282113130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5275b38a139b6e3349c13fda55aa3a445603eeded5bf86e192ef228dacc2b42. 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/VNA112300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a05ea55e220236fa2c84c9ba1a62154ec580701160c7e32de47c4808505ca4. 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/QM4TX2474372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d407c3a1f2c412422eee00a0cc8f23d9b85c2ce4cf4956652cd6b40ee59760b. 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/FRX202033171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b2e2406a695df2d128fb69f6975cefb25433f1e91112b9aed624c364df67c2. 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/FRX202033172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706c9a785cab99cfa47d30fd9e30044ad13b287797aa4ad8976e9da2aec2f8e8. 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/FRX202071087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d87f16fd6d550f128065e731224876e93f2878a3f2877b45b7e09b9d1406b1c. 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/FRX202059483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e047908e437ea0940f7e34d23e1568bd9fb5bc37f214def5f2b6cff7b8a78b. 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/FRX282087971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a696d1040a16df02413a099c8e03d2c3683e56d02dfba40bb57cab28bfb3a3. 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/QMFMG2328292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ad8b6fc05fb6f4b6cd524d0c55217915581700a0b5a93716b41731993fbbd. 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/FRX202066349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dd14db93fe7ef3500d7d658dd80af82c0523fd6a98992b45e87fa6692198d8. 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/DGA072203029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48e7d1927263f21f3d6f088ba69ec511683cb2d68a0ff14d8386ab2107a16b0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX282113122.
CỨ ĐỂ ANH TA RỜI ĐI (feat. Dương Domic, Quang Hùng MasterD, Lou Hoàng, Song Luân & Bảo Anh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475669b29735199aa16779d841cf55a61ecfa69e9c1d15c9d6b3d8a33b6a5aed. 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/US38Y2418916.
Một Mình Có Buồn Không (feat. Lou Hoàng) - Acoustic Version
Một Mình Có Buồn Không (feat. Lou Hoàng) [Acoustic Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2981cb9df1291e2f45e2edb2fd37cffdb6949e7df0203a5ba10a2541362cba1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/VNA0M1909129.
Một Mình Có Buồn Không (feat. Lou Hoàng)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fb875b0d7335de3690a03f306053d7018446d4de6535edb18bcca4f749e7c0. 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/VNA0M1909662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2981cb9df1291e2f45e2edb2fd37cffdb6949e7df0203a5ba10a2541362cba1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/VNA0M1909129.