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 0x276f763db7b4577ed6936902cacfaef5fe833db6a6756164f0c01aadbfa9964f. 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/21f21c6c-7f2f-48b0-91a2-faaf423325ef.json and https://artists.proofprofile.net/proofs/artist/21f21c6c-7f2f-48b0-91a2-faaf423325ef.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 0x7c547df10c3136ae6d06bdfdbfde00941ccb124d9efdfa2eb2297783b81f055c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR96X1946841.
Two Plus Three Equal Five (Tuanxeo Remix)
Khờ Dại Trước Em (From "Chàng Vợ Của Em" Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65aa60122149ee504a62e9b2bf3127f17873167f219eed42747b869dd21fb37. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/VNA0M1907664.
Sau Chia Tay Ai Cũng Khác (feat. It's Huy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05139ebf54f25ce356592735ebd83b8d4160c1efc38ba3ed70e02ea689f595cf. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:35Z), 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/VNA0M1908121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977a9b0e55a098c46c226626b954af42aeffc11b85d89f51ff7a08838ab284ec. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SGUM72000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cb5386bdd2da72020b4671bf19358240df36391c92a17dab5cae7740ae643f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/VNA0M1911642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf674e14b1a13d6268a4e2c88f71b1fe4f16eb249cb8628fa1f60e2b895d70ffa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA0M1913611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a3ea3667a262b46347c689e1bdc5250ddee07e721f81e1352c87bffe39f28f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/VNA0M1915175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212b79034b982af4240c5c61884ba762ca84031c4b2555c2bb143df6f356d94. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/VNA0M1916868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc7d8327cf5ea69a0d3a2758fd137db754a19850d0d145d358577e72e4aa7d1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/VNA0M1928010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b983b59a13c41a71c0fb9c70c67966434694ae13f64fc318807ec2304dd280b. 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/VNA0M1929203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da4c51df144d296cedb4298143bb475ef8293e35ebf9d43209ee37518d4c0ea. 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/QMFMF2335852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62be5c64aeacdab3482f720ba74778bb14c74ff07623080b88635d6b2444fb41. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:27:58Z), 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/QMFME2344134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2874da2d494ae221baee3809705e79ac624f34ebd8fb21d3b6c894103529766. 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/QMFMF2335856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4509d6249d4592173c51a32ca86cf77ce10bcd79cf4bc60514d079c48a184f2d. 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/QMFMF2335849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0dd3953c46841519b91ee297bc5b26d167fb6440f84648360dd296354172c2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QMFMF2335850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbc9a30b0e31cae9b917d980e29fc33f8577f14ae036d1fc6cd894cb82c81d3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:32Z), 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/QMFMF2335851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7379e652152b3303242aabd164d850d57326ef3b5cfd2389529df21feb6fcd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/VNA0M1939255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac727f63b89b7238463bf2b1c872c089d550a88f8831f7e86a83e26b944e605. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0M1939256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b4f9df48622d774bce1e5fa23d7c2c1bcc3389e60a44bc8808e34f919ef55e. 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/VNA0M1939257.
một bài hát không vui mấy (Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b60e5e2e22cea1077181e25417ab607fbde1729a9efcdf78727b1530ccbf99. 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/QZTAT2177204.