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 0xde405a7c98d0e1b2fd55d04f11edeabd9766d9bcd801034ff06f56c5ea8a9b77. 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/61292cdd-486f-4f82-a883-717418054ecc.json and https://artists.proofprofile.net/proofs/artist/61292cdd-486f-4f82-a883-717418054ecc.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 0x934d926709deca94682bac95c0a81147bab9c02e78ee31b8629ff52bef9f38a7. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZNWZ2020643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db14bf26346b533120f3bf7c82a93a3cf3f517b0c0f75229250a41840b95432. 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/QM4TX2286089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc23ab804e979318a3504d3797505a593d1655cd3cb661f19653252c52dc5009. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM6MZ2207145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7123405b7538cbd7f18f2135e579ad6565907e2f5ea6bf31e276a569a29ee. 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/QM6MZ2209713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe034e7295c4a51e2ae6f09a1e99023d3340738b3e28094ac38801482fbf29f65. 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/QM6MZ2209718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdc5d6b637e184c9a50fff7b1deab0bb51350b67db5c27c4c0ef785a95119fa. 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/QM6MZ2209711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45be21caf2a0b50ef47fb85aff421175eb2390f5c34aef80e5eb77a66db0f1f. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QM6MZ2209712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c89e517f6982c325a070bec24a869143cd66428ee71438e074b3a70808304. 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/QM6P42227024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759ff28c1c80346438613947664b1210c195b221aad3a2a2e95df0403e9e1673. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ92373034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55715b9938813d06842446928df5b4b3eb87d12dace93bbd018b5b35a0901c2. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QMDA62301833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd719a6678045035f27f1b89c996f1ea6c7f36f6c9c42e4a941ee0b4ea51c3418. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMDA72355228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8f6b2f2eeb97ccd5272280985d9cb5a7d3c9cea924f5903a5c892286b3de24. 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/QMFMF2325901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faac5c16d6e237ffe73007b1a868e6d3290e505e5085b1496dd9bdd4a6957a9. 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/QMFMG2316337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df58573669a0c4495304d7d81c549cc10e9caf2cb86f776b8364e573d8c9956. 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/QMFMG2316338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f10f60a588c44a7cb5ea0f608f79ebac2c42f1b074afefea68a0da57c0dc39. 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/QMFMG2316340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684277417bdb787f0ebb22a727b46310f8cc31c80b76e32f9fae1924ac8104d6. 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/QMFMG2316341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8339d2e00cbc8a52a726ece0853299a6fb3cfd7220d92bf3d5f0049ca483309. 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/QMFMG2316342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4507541e1467f32e042dd16be9f2c32b987dc2ed8a0974072ff64f0c73003d28. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QM6N22428651.
Đồng Mật (feat. Trần Hoài Thân from The Cassette)
Vắng (feat. Trần Hoài Thân from The Cassette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77754a6c7286ad57678e7c38b6e016eabdb7804a38d4a1925c2a0f312452d2b. 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/QM6P42451248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ae108b3f4d76391049e6543a38ac995a5b3e137f83cd71c715b2a2a01052fc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM7282450001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd8d91e318592df4c1c4eed79140a3c541a13904ac8979c314c89bc3be7714d. 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/QMDA62475201.
Tình Yêu, Không Gian & Thời Gian Instrumentals & Acapellas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36c040b9f3986b6a19033cb54578836a808b4ace5d0dbee18b491a2616fef6. 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/QM6P42532739.
Đồng Mật (ft. Trần Hoài Thân from The Cassette)(Acapella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632b2e723edb6f9171950fd22ee633e2e8f9f0573fccb49df7f3fbe18ceed89. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM6P42532749.
Vắng (ft. Trần Hoài Thân from The Cassette)(Acapella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcf83efbf7a875fd3c0e30e64645b6d91437fb44c83939e7cd3299bd68c2e05. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QM6P42532751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356a977b1127236b73245552c70f2fe5f1bb5a1041c946a269bf04507c938474. 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/QM6P42532752.