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 0x8ed033f1e9a252ac05ed94d957ad14ebedab2028b5e9abeaede0bddedf022175. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5d24661-54d9-40f2-ae24-c85a345a3b88.json and https://artists.proofprofile.net/proofs/artist/d5d24661-54d9-40f2-ae24-c85a345a3b88.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 0xaab901f251f063866c70dabfb2294eedf822e7ed76b2b295f982dab90d567dc4. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/VNA0M1910462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa039ee59260fde2bc1de0a6765e6df8a1b1fec7e2fb87ce68179cddb5e5c7459. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTBA2278570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf836d14297247cd1bc9437dedadd2fa54d9a8004c22ca56d26f4c7b0e7b3de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2507354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf24796b043cf41a830008a75c0493533182cf8899bb6d4ab82ea3af11e1bae. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/VNA0F2414943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd4c53d616b9feaa8c433b41c49df435e5b83fe4ee886622fe8d28fd6338f51. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM7282554373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60806821ef9f51e1ff2fa9e671fe3ef4941ec14bef52e7eb4b337312747be38a. 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/QMBZ92500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fc1f0236da2b176f3638da549503b4f00423a842db679130972d0030082485. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QMBZ92551160.
Mashup Anh Vui, Địa Ngục Trần Gian (Thahtrung Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7ea673863988c28a8492f1c91ccd1fd1741433f95d4231e2dc5b0375405910. 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/QMBZ92589897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140042971823fff3f0eafa8dac3bd239f977e8aa9759b4374a273e44785f775. 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/QMDA62585512.
Địa Ngục Trần Gian (Newt Music Group Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd95d1bdf0c3ce30b912917b0bb33a0218f367125e37f648af4787bf1bef2c63. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QMDA62585580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d7eb5ad8682bba0157a51bb83eb1321a42ae06afdb9456e825d90d8b0faf9. 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/VNA202500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e5dd6ca880913cfe8c6e440f903614580b3b26f55d71bd93158cc0b5e91533. 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/VNA092502175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf68c32fbc0d7ef5136d2ac8c97ea11ecc956ef02635d7b4a30fad19ad40dd5c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3F22513215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0b9bfdce52a11f696859fbf986483b843647f86d19530ed3bb2eccaec4d0b0. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F82561118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d44dfc4f4fb7ed07f1a22bf7e88cdd963c98a45d1c7c7db0881780566d0e9f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/VNA0R2501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9e7217146ab000c8d1f06afe1a09c6a7a2d6d15367bb6eb63cf6bafa4707e1. 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/VNA0R2500916.