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 0xd36dbef0d042e99f229085cafa2ebe566d80c93c6fc2479b37be18c0292a22cc. 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/b47ca418-cb72-4f5d-8c84-4bf621871f3a.json and https://artists.proofprofile.net/proofs/artist/b47ca418-cb72-4f5d-8c84-4bf621871f3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Em Ơi Nếu Đừng Dang Dở (Dĩa Hát 740-2093)
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 0x3f9792065f7d84f545c73ed2f31755e7cea0669d7429e1385aba9722209f06a9. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/VNA0F1776653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94aadcc0b21db3a4b7bb9e52ed63518b964149d0d6e2641f7fefbbed24e8d69. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:00Z), 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/VNA0F1776666.
Thanh Thúy Với Những Tình Khúc Trúc Phương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd82f0669c1c25ba99e0c0125f7862e29adfa8ea2998630182a40521c1aebc9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM9SX2112529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c722276adf204f4de4dac1b92cb80c5420e8d884b7b0eacc6d6ac6046393211. 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/USCGJ1924038.
Kinh Người Biết Sống Một Mình (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1aacb7f29e28d8ed5880a71684f1bad9078cdce01b55ca63e50d6db519d4546. 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/QZGCD1806397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f4ead369be01be6580f4013af3556995d359b8b1ab6db78518aa8e1ca21da. 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/QZGCD1800544.
Liên khúc Trúc Phương: Mưa nửa đêm, Tàu đêm năm cũ, Nửa đêm ngoài phố
Liên Khúc Đêm Buồn Tỉnh Lẻ, Những Đồi Hoa Sim (Asia 283)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af2204fb52688b66eacc2f23714c77a27fc34177381a6f198dbfb7d38d837ee. 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/QZGCD1803999.