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 0x40d7783ab46533507a44f740bb63126105e3cc756f34f20dae58e068e52ff00b. 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/cc55f242-a101-40c0-8aa9-b29714970657.json and https://artists.proofprofile.net/proofs/artist/cc55f242-a101-40c0-8aa9-b29714970657.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 0x9ae18bb015ed3d6170ee057d50174736e8988911ea20470b9354effc1a0c320a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/VNA0F2327550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4aaedf819b8196357e578f77e014d4077eac123a5bfcd006356f89635a128. 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/VNA0F2405442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e3765cba46b0ebb83daa25d0918c82ea0c190716b039eb6b43c45a0934638. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/VNA0F2405497.
Anh Đau Từ Lúc Em Đi (Style Huy PT Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a698447d820b08c6372aac92d17571df69ef3ef3160be19cc1a2e584128163e. 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/VNA0F2405859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b9e5288f123e4e102b24aa54306ba18a6c53713581221cee56a747999c503f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0F2407183.
Đã Đến Lúc Phải Nói Lời Chia Tay (LUNY Remix)
Đã Đến Lúc Phải Nói Lời Chia Tay (Tuấn Smile Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1b273ca3acd89fe3d48759c2fea65ce7efa79e7b9bf91fbcfe6c186ae1a4c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/VNA0F2413427.
Đã Đến Lúc Phải Nói Lời Chia Tay (New Ver)
Đã Đến Lúc Phải Nói Lời Chia Tay (Remix)
Anh Đau Từ Lúc Em Drill (NHí x LUNY Ver)
Anh Đau Từ Lúc Em Drill - NHí x LUNY Ver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421c01962fb370d4ecb9f5a93869386ab67864695f371fed1b7cde6a1971477a. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/US38Y2538344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d545e45fdedd01d795ea5a77289cd08e2289cd087e09b56c3a238fd2b0a9e81. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/VNA0F2501677.
Anh Đau Từ Lúc Em Đi (Classic Guitar Version)
Anh Đau Từ Lúc Em Đi (Thanh Huyy Remix) - Beat
Đã Đến Lúc Phải Nói Lời Chia Tay Ver 2 (Lofi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf35b1ed4cac38113ef27892d3ed804de7a79484bcf2b2e94f7f9ab366dba091. 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/VNA0F2503100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85043d7e792932d1fefc7708b95d2111bab002f8f5da1ad7f2e907d47ca3d6c. 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/VNA0F2414841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995055d9ad265d13119fe493543e6220949165a0408919145db9532575ab387. 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/VNA0F2508885.
Anh Đau Từ Lúc Em Đi (Frexs Remix) - Beat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b47ce08c4f52f4df6505fee027b97bb05bb98a73da8e9c70a192e2f6371259. 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/VNA0F2405228.