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 0x405a50034b18b4d7e9dd74236e2c5fdd4502f3915b205782c1cb3c830548ffc7. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0e175b8-6491-452a-973b-5e2b8c2b58aa.json and https://artists.proofprofile.net/proofs/artist/d0e175b8-6491-452a-973b-5e2b8c2b58aa.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 0xcc88e7f7c6dd12593020aad3a0592a3d7c8ebf542989d39cb13727f70051c685. 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/VNA0M1815357.
Tri Kỷ (Live Version) (feat. Ngo Quynh Anh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7be2bce86834f8dcefb40d2d37a49c0867b279e99d8d4186e57b75043cde9f. 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/VNA1M2103849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa5135033d33e99d33faecee08212e490eeb4976156ff33ed4d7cbe6cd8406. 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/VNA0M1929348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8de095c9e0ac4f6b1ec270bc1aca88dcd4e80830b58d061ee81c2d3e99599. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/VNA1M2280756.
Sài Gòn Tôi Đó - Ho Chi Minh City We Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983abf8702cbf44631d3862535b22d424f20a860cb04de8d4cf581bb44e9ae1. 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/FRX202568299.
Liên Khúc: Cà Phê Một Mình - Cà Phê Đắng Và Mưa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf30d4ef383c2b9cfc4e99f721a04cb6f282998d8462fe71348e87437fb25f2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX282113073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd0a42a5409a0a1338ed1c8350de992ef07a5d3538b0701d5073ba04f4074b. 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/FRX282113067.
Mashup Cafe Đắng Và Mưa - Con Đường Mưa - Vầng Trăng Khóc - Live
Không Gian Cảm Xúc (Mùa 2) - Tập 14: Dưới Ánh Đèn Sân Khấu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e5fa7edcee8a35b55c69d9638019f2f2c1937a378b30f8416816d2f17e6b8d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/VNA2E2313284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b2d81b8eba117ae47550a3660012d290446021cfedb825ebbbdadae9050c4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/VNA0M1816840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaecea7ff787c652b6b723c06024ecca01c9907a7260919a9f9880bf049dbea. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRX282113080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a449f13c5cd055cae4172a85c5f0ef4d4eef961ce6f965e101c75092321fc9. 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/FRX282113083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9319b5ddd7fe9d1803aee28aa8e1bfc0154fffd8844d8cbfb47dfe66eb3ada60. 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/FR2X42483709.
Gala Nhạc Việt: GreaTET - Thập Kỷ Nhạc Xuân
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6d11ebdd29999fa49b8a99e13634a859f6897f82ff33846b46f1ab2764416d. 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/DGA092207999.
GALA NHẠC VIỆT TẾT 2024 - NĂM MỚI RỰC RỠ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29a85c7af8e03c6c66a7f9f647c380955516801c368ba65d2398401622ebbe9. 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/FR10S2458306.