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 0x40cbe8685f1a2774443ea3fb4e4e0a7f6da457b9f6f7d227e499ae5f35065e46. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97ddf973-3190-4edb-82a7-0230a9befeaf.json and https://artists.proofprofile.net/proofs/artist/97ddf973-3190-4edb-82a7-0230a9befeaf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trúc Hồ, Trầm Tử Thiêng - Bước chân Việt Nam (ASIA 54)
Liên khúc Kinh Khổ, Việt Nam Niềm Nhớ, Video clip: Trầm Tử Thiêng
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 0x37673caf465cd3b5b1dd5071c752930e1b82236a2877663c3104f92fb136b4e6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZGCD1806487.
Liên khúc Đưa Em Vào Hạ, Bài Hương Ca Vô Tận, Video clip: Trúc Hồ vượt biên
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60040d69ab62002a69d0c76fb8e2e6630b880254a1e1046ffa45a619c7e64b3c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGCD1806488.
Hòa Bình Ơi, Việt Nam Ơi, Video clip: Trúc Hồ về thăm trại tị nạn cũ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dba29a25503478c02abfa0b4f5a69008f11ddccb33c833132ddb5c8941edb7. 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/QZGCD1806493.
Liên khúc Một Ngày Việt Nam, Bước Chân Việt Nam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad494963f7d663631bba3a4d2a1c50e9ba4d3df359de1be540fa3b8477ca13fa. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZGCD1806510.
Ca Khúc Trần Thiện Thanh (Chuyện Một Người Đi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1114ccb689b30654b6d808837fe19888005e48e8fcecd810e06f03925ace411. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGCD1805776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ebd25b75ee501380c3603ef46fa5dda6a7c96f48f50e4221fbb7d3898b66c8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZGCD1808491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f8d64f173cb3af1aab8e0c216232f1d0a06686c406753afe80cbd80b21039e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGCD1808492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08f5283f9a13ecbfe070b6f4170057f0f327e636f32619760b89e9c7195c971. 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/QZGCD1808493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb72eec5a4757a7f3d1e214d85c6fdcfeaa7536172d30f3eace7288a9bc89ab0. 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/QZGCD1808494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f19c5e344d91882de70709da015277505729a42724bf2e705ca801d91c3a73. 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/QZGCD1808495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd1beaccc2d8c4450f797c806237546d475050bfc89e0d105188a6c982e2bad. 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/QZGCD1808496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2747085647109eada94bb79f00474843dd1575a5a4c21aceb61fc0932d0600. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZGCD1808497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410e9cac933d2fff692d630526ef1ef3a58961ddcc21de69a470e256ef66f048. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/QZGCD1808498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44201581551aedf17708ee3bf73558675609512c372d0d6b42dc2c9c4be75e46. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZGCD1808500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6daefb852622eb1381dd59160086861eb0b41eef87e9d513d8ba9d2d8413356. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZGCD1808502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead25e3e289985a184e5e389afcf049bdeb49af3dce81faacab685f48f80e32. 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/QZGCD1808504.
Liên Khúc Đồn Vắng Chiều Xuân - Phút Giao Mùa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8332a16540dbc4d386e1c2ffbe33de3e65d8ffa556d682c0b45a0ee14002de. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGCD1808369.
Nhật Trường - Trần Thiện Thanh 2 (ASIA 61)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97659f0825681c76bbe915e8320e1a407556da018d93b420e0dd0f15311f0df. 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/QZGCD1806329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466c459dd3409eab33360321989391ed17c1107f5d98a57622db6bfbe79a6c5e. 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/QZGCD1808414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f59bd01eb5bddb9e4bc540d5894b4e207c27d8e94cc359b9abac74500ba35a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGCD1800545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f963d8d1e6d579bacd9200c86be2f8f69af164f844dd8e08ab8f217fef9efc7. 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/QZGCD1804250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88de90dd5567e08da861630ccd722ae0bb54c71596993ca3d16f3502585b4fc7. 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/QZGCD1803642.
Xuân thanh bình, Xuân chinh chiến, Xuân tha hương (ASIA 60)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a555012885b587372084f99441d166b8b0463ca24737a760b9022a8ccc3177e. 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/QZGCD1806350.