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 0x6d1b193a51621d32ac4197702d9837f6daf9443e524ceaffe485f4e4d7d9fec8. 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/2d0e2630-8453-463e-a8cd-d5aeaf244643.json and https://artists.proofprofile.net/proofs/artist/2d0e2630-8453-463e-a8cd-d5aeaf244643.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 0x0be1255545c3e8483bec82b96a8cc0fac3a0167f60f0ef6f7fc4f6fa6995bef8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GX53U2025225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9c51e82a16c131c2997dad225a185a6fdeba092c3411a0538dfcd7200ddd7e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GX53U2050204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7362f257211d8b3d3d63e45c289585cd1cc82d948bda71ee096516792b632256. 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/GX53U2050206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1019ebd39847f07aa54c3d77948c57b8104708d468232aab533e48317dd2a79. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GX53U2009973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9916da97149829797c9580890cd65deeaf2fa50a9f5ad0a5eb4a3d5afced5d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GX53U2009978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edaf8c82e2f811fe982ce1ddd2123bb9ab696986c969c255ae55f5a94cb4ca9. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GX53U2018470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01fa630ddd4fdc13d9c6ee1fc226077a36b973f4cc2809b167af6152292b934. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/GX53U2008756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe309dd520ece4e38718067582b59bcfafacf4d0f66fe41fff47db239f18cbad1. 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/GX53U2009996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba39f6e1041f4d2a7736d7cf2912bf26409f63e17aa93ba35c925783ffdaa9f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/GX53U2012187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fe4826f2ad786ceccf5c76b3d53393afce87e68630115fb5f82a7106b1e7ab. 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/GX53U2014734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412eae655db924df18fdd82d9629aaa93953a2c3d7b037a730b5d6c7ba68d2a0. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/GX53U2011624.
Liên khúc Bỗng dưng muốn khóc, Vừa đi vừa khóc, Những đêm em khóc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef4144b955d165a59cd84517179458c01f2eb859d240a1a8a9c9dc00af9a8e3. 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/VNA0F1727004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b37917c843179f6a0a61b569e2c150ac468f3cfdc04e3b971155932e89e5ec9. 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/GX53U2008464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bcb1fecd37a37433e7d72a948f9eee3bf321d073e2544ab4507f915c3bc88a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GX53U2008465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cffc410ba5230296cb834cfeebd380f91d4a4f0f226c23c435cd53f2cb50449. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/GX53U2008466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96e9b9e026cb90a5323633c25e6c4df19190a1b89ba5e1d6f604998facb5c39. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX53U2008470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a10b89df174dab2e3bb9d40c5fced70545a4f040befb754bd150824d7f528a6. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GX53U2008467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e81d5ed7c0c462157f4a69a18fe1b5b0fd19da8190ca95541e1a2d1fc0fdbe. 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/GX53U2012517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f77b9160e4b423e017814599ac0a1bc2bd2a01e89ea96d0f4b7ec43d19b4df0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/VNR011053622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea116b8241dcdda1dde735c1c4935816014c9f1c7140bb477527c6c2e5f37068. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/VNR011053624.
Bạn Ơi (From "Lật Mặt 6: Tấm Vé Định Mệnh")
Bạn Ơi - From "Lật Mặt 6: Tấm Vé Định Mệnh"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b684e4226901f1bd4d65b5dcac61f4d17dee5b145099677a636b3425392cc5f. 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/FRX762302994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b413607c86a8bcca082dfbeb8225d2039139d2d80f7cc77bd88960ae317d97e. 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/GBLFP2359928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fae6b0c7562599f5021cd305454e8f54c11d46dcd1f7a30f962f80b7d26d53. 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/VNA0F2408374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cde97332c1eaee9051f0092db16d2ed60c76765b3b7f9f1a389d5713f258b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/VNA0F1774011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ec82f2552fc2261d7df4ba755604512746dadf4ede092633ec42609c682b1d. 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/VNA0F1729075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0813e75a6533f00d0f66cf98204c117fda58ace81a95be5e0240bb50cd7a9756. 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/VNA0F1729269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68638abfec3285694d81301e8d7812eeb2388532d94f56a174475a55c67392d8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNA0F1773537.
Gala Nhạc Việt 5: Xuân Đất Việt, Tết Quê Hương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaba702ac04050a6ba5ad9a5c1c053f3aeea67e5296427421eb42418c8ee5b6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX282113050.