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 0x66d468ffcc4519712c39b291c096b29e371e08d60d35121b575471a521eb2474. 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/54a4c9d8-e71d-4a71-b2a1-b4a5356e7b2e.json and https://artists.proofprofile.net/proofs/artist/54a4c9d8-e71d-4a71-b2a1-b4a5356e7b2e.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 0x73dea0296858550e45a750cced858d13604f07b21014f0874255670e68bff40e. 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/VNA2F2402232.
Khổ Thân (feat. TVK & KaiSoul) [Remix Version]
Khổ Thân (feat. TVK & KaiSoul) - Remix Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f72bae32379bcef662a8da922941295e52a7ad7527eff0f62cc94db96e3faf. 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/VNA0M1938151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee46a29e910d360c782d6bc4959e1d8666b933bcdcad0375bf8bbae9f49191c5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZYHM2419661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb55b78951652f5b3824b3db8140ecc988c2b7e3fea3766d795867aa1814e18. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/VNA1M2289405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbab6e884253671ad51112129d4bcf44308aa1e25272dde790fb96f3fb276d9. 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/VNA1M2284449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc387f9a0a849f6a2ee007e783199e8aabcc5ee69d2eddfcd3d60e7bc58b689. 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/QM4TX2424083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fe1ddc506b0f3deff8ce158e8fc4abda5ea6655e0618d07e8a52210aaf21c0. 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/QM4TW2476125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0497665b5cacfccf017c56b7ce08fd2f6f6e96ca50ee0f4cd544deacb8d4939. 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/QZYHM2401622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7329e148bbcf40091b015041a36e03bf4a3bb45838c7abf68990d79cdacf6ce8. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZYHM2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a201d38bcc8934bd18282921a36e6b9a5d6ffef0d8ca445ec30d13b49895a5c. 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/VNA1M2281261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022a44d993fd6f37f6ccbe297802884a8cbd5f300aaa231402543df23a30a685. 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/QZYHM2375346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e50d903b80d5bcbc7163490ff93ffd6a2c605182641d397529fa2f404adf7b. 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/QZYHM2375375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4848eb5643ffb5ab686972c304d51b7832427817f9d053801bf8704d0d19730c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZYHM2375354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d75692979ea28f6e997147b1dffea8080e5ad698cca7eded2686e33b12b19e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZYHM2373144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8416b456f89a11d15fc2592843439327074ecd7b46cfec3df090f435a3091ffd. 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/VNA1M2278181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f55dadeb957c422efb5e67f3b8dba801138dd743eaf4272b5dce73a1ec0f8aa. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZYHM2364840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183e8692c12270c3169ceebe02e4e1b436e41b4f7b490fe24d7a20ebc158273. 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/VNA2F2300919.
Đâu Phải Cho Anh (DORI Remix) - Rồi Ai Cũng Đến Lúc Phải Nói Chia Tay
Đâu Phải Cho Anh (DORI Remix) - Em Đã Đi Rồi Mà Anh Ngỡ Như Còn Đây
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1e96181bbbeac041678552fb7b5dc1dc0238ed45ea1bcff4904fa94fb6bc5d. 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/QM7282368467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7157ca7ccf2d6a2c787c8a11bcbcc853c5ef8063c97c8704a59eb735f3f73. 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/VNA2E2313380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc0368749ebd86dfacedb585e3430f94c33cb5904f2826a9c9b3c680d3145e5. 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/VNA2E2313303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e0b338ac9980921e243ee21b1e0788b55e34a4d4d2ebbbf64aa44a23508cf3. 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/VNA2E2313280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8803a7a14f19fa6a08150a223f2913d2d9611df865cf33d5e9185ce70a82d30f. 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/US38Y2434645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d2376b5242839cdeaba22b620612a90952f2665e1d57beb94ee6cc2798dce6. 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/VNA1M2403855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119845c07299dfb01453c90dab13f3d0be5a616da7fb78996595d1dfc6c3158. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TW2558703.