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 0x2b2989bd7f848d861ff78ae5aeb840dcca48b2988ab9ef12a9e7b2e36b252322. 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/b27c1946-9bd1-43b7-993a-303469c90f40.json and https://artists.proofprofile.net/proofs/artist/b27c1946-9bd1-43b7-993a-303469c90f40.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 0x2bd957b960bd9a02131bce6282fb8882b1b3556fe20f5deef90adeca35eace2e. 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/QZGCD1803340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1892026d492a4e33fcb7859f05c85850338d7db392d133aaebc57e40dfa7bad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803341.
Liên khúc Rừng lá thấp - Tâm sự người lính trẻ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe209d5dc4986894b10c8c82d64fe13c09982221f387607433bf2d5e94e3c2103. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGCD1803342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b80d8962547447522627e62d04c749922e7f48a28c61a4d0bc47337142b5a9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc74ad196b4c74e2cf110efb17fb1e500b7b484b1aaadedc0f4bbb28845946b1. 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/QZGCD1803345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7583f7cedb6c5489db85fba596eb9bd2a4d1008d7a4b14b9f5eff25be9cba57. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e821dc0166a0ff76e7099b6649c55bd666d9e7c68f53b450b18c34b64c5af08. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGCD1803347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d5db7186bb26d16d612fa360ea8ad1c96efef5a303c2d8d3f3653c13650165. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZGCD1803339.
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
Em Ơi Sang Nhà Anh Chơi Ba Má Anh Đi Rồi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028c1683643ecf07997c433be0c59793ff8fa96b4a6661ab0ce5ab9521544ef9. 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/FRX762006518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a2e442ea405b12f2675e1e0422dbee49c525aef416909c2120f6aa76675f1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRX872132436.
Anh Khoa - Tuyển Tập Những Ca Khúc Hay Nhất
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4e248f4d7c9f42d60ca173fb614680ad8e767b79d8f97fe49f4f22a87d7f89. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:37:48Z), 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/VNA0F2017639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daba979a5f5ba7392e479ec654da976caea3b3cbb7c752abb002ef972afc5ae. 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/VNA0F2017674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71a0e825f2343242a1db5461af90bfd7a1e497d5e0848ba848671da8daae341. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/VNA0F2017700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0acc8c9e6d0209ff45d88956a2571e5e5a72c52496de6d8f869796cc577f3a. 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/FRX872103063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2bf8328a8ea57c9c606143420bbdf8946467058e5635d9e5f6cbf2855bdda6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX872103062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54c797e8409f3d0ab17e818a3504b9d23e82697cac22f319be0c6fe4f1b2a98. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR59R2283597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fbb71a2bc83f5d35199528c76929e193bddc9765d6e20073a73d35054c7185. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZN882248422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbf216edd4c7c9a1840d50b20a76c9fe4fd14d4e4ddd69e574057f9d887ef9a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:51Z), 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/DGA0L2326333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aee00cc671003f29605637a5e3b79547354d7b020dcec0095258968019b5cd8. 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/US38Y2403657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f534b0730d0eab4a5e9c0a0a4350cb8dee884c5274ffaa70f5c1ec9a4b34b76. 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/QZGCD1806278.
Liên khúc Nghẹn ngào - Anh biết em đi chẳng trở về
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1faf516cd59fe8a5013fa49c325a1bfc971ffb5d736b2415e32ccabd5227244. 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/QZGCD1805010.
Liên Khúc Nghẹn Ngào - Anh Biết Em Đi Chẳng Trở về
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7c44a7233ec3e7ea0123721dc90037ff9b745dd21ebe03d82d6ed417f73e9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:10:00Z), 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/QZGCD1805943.
Liên Khúc Nam Lộc: Người di tản buồn - Sài Gòn ơi vĩnh biệt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb793ea7c9f3ec84383f2497db3d80dcb566da8b8870711682efda6efd7c67e0. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZGCD1803992.
Liên Khúc: Đà Lạt Hoàng Hôn - Thương Về Miền Đất Lạnh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4602de4b99e2c6cde5056c1546787a658c4e74619b576e07774d7a7cabb7d5b. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZGCD1806546.
Nhật Trường - Trần Thiện Thanh: Anh không chết đâu anh (ASIA 50)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc19372ef2ef8e2ed644691f024c7c0920039a5be4304095c0e95cd87cb5196. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZGCD1806585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717491d7be09080889a20458de18d13c716b0b7ee83a443e8f874cd0dd36f367. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM48F1859803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b2348704828a3f56439d67123447fbc947efad1ac822fa4afd396fa68872a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM4TW2077071.