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 0x5b0c5d13294254f647e90f19ebc4cf18dd00ce51e3a85dd0f68221998a48b4a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8fd9bdb-cb89-4dc7-b47e-039fd918ffe7.json and https://artists.proofprofile.net/proofs/artist/e8fd9bdb-cb89-4dc7-b47e-039fd918ffe7.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 0xebd4b2dac174d5b6310474f48d530d40d03fa8525680981f34c50b975093704f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM48F0740901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd335336cc2f4a565b9a4aeae7f0a76866f4dd9b3f19b36cdc6b082a8ac966814. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QM48F0740902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7841ec45d35ee95e104da68f7fc4ab9dbfb53942e0c74a379c4806e5291f60. 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/QM48F0740904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7287aad2ac1c97c4b7248b96865f8320a981250f591925f9423d3c4063d4ee60. 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/QM48F0740908.
LK Áo Em Chưa Mặc Một Lần & Vòng Nhẫn Cưới
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecb456b8a4467e97059b0ca6fa4aab79866fb78a25d009689c5656bdb8f24bb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:09Z), 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/QM48F0943503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760c1f36a4dc982989d13c5aa89c2999e3b4026628fa44beca30ab8eb9cab46d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:21Z), 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/QM48F0945201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425e5e83ab35c8f1776465f107e7abb374f022cde07fc3fc04c5cabcf4e9ada. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:23:53Z), 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/QM48F0945205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe1a8a232ee2c3bf0c28935f37b5ed9e13bdf65f81fa7d7bf47f69cc0abca1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:43Z), 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/QM48F1149401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059fd303a462334210810305630ee7173918a3343330fa18cc89d35faa5dd131. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM48F1149402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49758f040ff3edc5c3b9f0212d20a9bd0f18c11f4f7317bffa063beb898cd09. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QM48F1149403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2576abffb5d055ded83e4983c749ee8e98dd903f330b592540f764dd5ecad00f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM48F1149406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c35a6a437478ba3cd2c3c4fcaa0cf2120b6846c3d81e39dc5cf2134b5f2051. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM48F1149407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9529069d4a128e7dcaf5eabbf29f20cc533bf8689e3009e92478985e74e467. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QM48F1149408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5065442015e1d4fb7fdbeae8ad00497def2ef6f4047652041ea4e3f1fa1b8a. 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/QMBZ91913316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57135aec8e48ee9d02be39233b9c9f2f9bd2829db7e5cf1964640746e9cb3643. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM48F1656408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b6590086b29963badd6ce696ac65a0d3d89413a08dec6b8310b857d9e2f23b. 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/QMBZ91911643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a870af49d76286cf90e39b38f9655d48421f7112e26c8a7be0b537319099967. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QMBZ91911645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1acfe2fad7a2713e1555866afa5a0cf2d81515ee470bae9ca4053037a57346d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMBZ91911649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450682918e631d9d629c49926bc2e9431a81381dbedd6f26a8f5a777c2799cf5. 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/QMBZ91911650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0175da485128a3a454a23039f2e2890da8524d92b95c24b53fdd1967b4e434da. 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/QMBZ91911651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b50514e39b9016f446e848b66219013fead6381e61abbd553d12ababc48780. 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/QMBZ91911652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d4f3ac57bd8a6b7a9d1df929d271b2dc3c2f45c520cb57f2d0588c1bd96cd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:46Z), 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/VNA0F2007884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ce5ba6378868819b0baf3ca485365bdc3a096969fab5a7925b0cce1e2e882b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/VNA0F2007853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa767d5fa0557eb2a3ddf9132224ac5375079c38c90ce188273057b709a09d66d. 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/VNA0F2007874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6148e8be08118a623da38e6d05be43d23ff3ea23233e56c27e2260e13097441. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QM48F2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bff6d339e940eb7d9f72f50efac1d54831a085bea0bee20e75349bdae01a26. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T03:50:54Z), 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/QM48F2000204.
Mảnh Trăng Gầy - Tình Khúc Tuấn Sông Thu
LK Ngày Xuân Tái Ngộ & Mùa Xuân Bên Nhau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb93f971139490140f6df4a82d71c4aa13bac2b99973d8841cb8bb9a7b214c7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:52:53Z), 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/QT2VB2512297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a33c4c3b04c01434ebb14497ea8e5251c0339599acbaf8f0fa9184672b5a16. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QT3F32503823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd510ce726dee2eac6bba0115c7c34b931e8d9cb460b4fe457117078de590fa. 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/QMBZ91911663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b34978784d552e7d32addbce1bda5910e2e0f3e202b3f6b00632b988c9e6e6. 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/QM48F1556107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b522a4019251eeb16df721039c040212e13a919df95eaf9128a211e53b89c3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/VNA0F2312078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9002dadfe8f6a4b99ffc014346663949f32433c72b502c41ade98e65c58685b. 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/VNA0F2312083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a7f359d939f1ea006d0db1b41e163498620ea28435c1da192df43a608c033a. 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/QM48F1962108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764bb5e504444bb4e3c49f955ef867f320a4daec0c3046f4d6a32426d1a09c0b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/VNA0F2312095.
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 0x03aac8a33f6f24bbf30e8f260455c96f19d79153f1545dd924e6926c2d4c106f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/VNA0F2312080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba1c4e8354c241fd6358eaaf23a10fe2df3b1db79a0c441881ad898bdea58a. 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/VNA0F2312072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9956cc914fbb29c4ee4572a8318fb6efc026af3dd17334c15e59790c9bf7dda0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/VNA0F2312052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b8040d8dcc4f4bf4d6fb4cf024ddf09deba5489fa8bdec5b565dc3a20db222. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM48F1657403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aedaff8c197978e0c53b16f88f52f940120956e99ac8936ed255d57fe40e480. 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/QM48F0741402.