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 0x5e4fea7febecb661022fd5fd74d0b8a65260ff9fcb1b134fd942c2d40c65fcff. 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/a226fc53-567d-4e66-8412-1ced638121b2.json and https://artists.proofprofile.net/proofs/artist/a226fc53-567d-4e66-8412-1ced638121b2.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 0x18b560367c769b09957818585172941521ffb4582122836dd30411bf76f189d0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QMDA72236538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985181968306853d0baee636c0193c9a91a4c3c66e14660b1fb0eb5daccae0be. 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/QMDA72236535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a6e691c50e886e976aba43833e2bcc799c25f7fca5ab1dab10de0f9ab2820. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USJ3V1116779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a2b39a484cf397be970d071a8696d494a3c1d7f4993d4d517c9abf9f2755f4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/VNR011029865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ac7a36ea6ee091b77a179dcbc4aa3f167aa713c3cde4c11ca9e262ab408947. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/VNR011029565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ce8f123cd30fa39be00efbd84c1ad5c7f85a89c9ffdc25bcb4a137e9ef1069. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/VNR011029523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5983cdb5ef4e724185c3fa1861d10ca0eca09657b624218894d8592287af54. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/VNR011029636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5983cdb5ef4e724185c3fa1861d10ca0eca09657b624218894d8592287af54. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/VNR011029636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7916ea36e8e8696c96d3eea0f97a5d26016c2af33f8ed9246bcd4fe3b6c042. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/VNR011030090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ac7a36ea6ee091b77a179dcbc4aa3f167aa713c3cde4c11ca9e262ab408947. 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/VNR011029565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ce8f123cd30fa39be00efbd84c1ad5c7f85a89c9ffdc25bcb4a137e9ef1069. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/VNR011029523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7916ea36e8e8696c96d3eea0f97a5d26016c2af33f8ed9246bcd4fe3b6c042. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/VNR011030090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd3ce2d83af8e8cec8b576bdd30d7ccfbc199d9e3aa4a7702105d37f1f12fcd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/VNA0M1838322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd245dbdead8557cb9aa7d8802ca851ec72d43967bef9147c34f926e937d8d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/VNA0M1838330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5a1da88903551dda1bcdac377340fbd01c4027d1fbe831add5b268a5b22e5c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/VNR011051922.
Lời Xin Lỗi Của Một Dân Chơi (Piano Acoustic)
Vì Tình Yêu Mà Em Trân Trọng (Piano Acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b622b0223b8c36493a47f19a7c01d9850da7e83bcd152103a61fc64a827b686. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/VNR011131047.
Xin Đừng Chạm Vào Anh - Acoustic Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3570fa83dbd4054d926bff2f00d332fb6f2983f5b827725c19275ecd738cc362. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNR011131314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cafe6669f72a6eb6680cff40e334b8817af2f89bb77569dc17c47d677de1d11. 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/DGA062334502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cafe6669f72a6eb6680cff40e334b8817af2f89bb77569dc17c47d677de1d11. 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/DGA062334502.
Thì Đừng Giận Nhau Nữa Nhé (2023 Remake)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffc67169cda4057f293b0ebb71d1ba3ba6c5cc159a1c670baf2f12809278ccb. 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/DGA0M2302281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c65e1c08df66367e0f383d307d735bf8934698afb3fe17237263141a015d95. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DGA0H2328712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c65e1c08df66367e0f383d307d735bf8934698afb3fe17237263141a015d95. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DGA0H2328712.
Duy Mạnh Acoustic, Vol. 1 (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ec8eb9c7ee5bc4477c37625df8a298a3633a4823e848127a063ef9b7b266f. 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/FR59R2451142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d3ec3f47b6276b3a05316ccf0db62788042d6e0e311529d2afe1a5680d7b6c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA2U2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9533a7fd8eb92a214be528431060bd89a128b699103a8ceb871865f963733652. 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/VNA2U2400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cde6f6d1d37432c4bceaad25006184f3e05b16620077d5be7fd5eaac4fc21b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SGUM72500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d216135bb0cb3116539886fa5abcd527fb1de0ff4c2a1636f9ab859b5e7ed35. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SGUM72500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a79faf4369e97f3bb8f823dc08c2960574faad806b1b5742c66d30e6729574. 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/SGUM72500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b94395ee5a9ebc7849ac737bbc93fbd9f483ebe857fb3fbe286ba4257930a4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SGUM72500144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4812fe2f2d8a42c8066fac2c60caf22bb00814b8cacd1305f43e6379b65914. 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/SGUM72500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666524f53eeaa141512505603c7063037f2f7f045b41956963c408a4b400f42c. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/SGUM72500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b845962b3a969d81bc1085d2fa90917661c2db01a387ea14ef730a03bb08de6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SGUM72500246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9475e21b38007910261283f0d19e9babb81cbca2a80fa3ab7f47fcbe7cd98056. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/SGUM72500480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1754d465bbb2e2a3c317c2cc92ff456bded47e09ba998b21c62fba8d4a1c64. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SGUM72500554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c2741d5e8e8c158595c83aeedd6943515a22bbcf4b8bbce857e4076905352f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/SGUM72500558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc4fcd6de576f128022e585e30df00bd1f7f031cd25b8aff76190a7e48cd716. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SGUM72500559.
Việt Nam Miền Đất Tôi Yêu (2025 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd79a2908240a435c1f0002b543713efe9409d3d233d4642a60aaec7eef4c792. 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/FRX282407694.