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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 0x4e25377a7ddd68b933c95033a922777e2a0cf5a2ac13bb11a507c6f8d7c51ff2. 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/3467a9aa-a84a-4d96-a69e-176fd7df1f9c.json and https://artists.proofprofile.net/proofs/artist/3467a9aa-a84a-4d96-a69e-176fd7df1f9c.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 0xbb011a06a96531b5f5992012dec042ba918dc0212bc1c41f9b3fc46e57debcac. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMFME2289091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8def5226b6b09272dbefa4d66f3ab7115cde6f8aca3bc045fe69fb028616db1a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SGUM72301285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f52a1fcbbd3bfd4239d860c561b00bdda38a9219447a602098d81fac40812af. 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/SGUM72400403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b67a8972d14fd5ccf1fa1d432d374e54a225bb1ba8d17c0342b449bc7e0b04. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SGUM72400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8e15b51d600c022e8b1aafe7cd97eca6f491f66d5c818ebc23a06e6cc125ca. 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/QM4TX2474092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987bc7d854f09be1ccd4e1fcb281671f2e8b495d4473458f4fb96df6f893f05b. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:39Z), 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/VNA0M1908010.
Mashup Từ Chối Nhẹ Nhàng Thôi X Không Cảm Xúc X Trên Tình Bạn Dưới Tình Yêu (The Heroes Version)
Sài Gòn Hôm Nay Mưa (Live Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d9782114b100bdcc2fab45aed7a625da1964aed5dd14c2d5867f8c87ea2b83. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SGUM72100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe764e2952961b9caf992fb243fa8464ee16be9edd4a27119c018eae5b2ee5895. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/SGUM72200426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af5ba9c99fc3456da8cad2620ba132d90fd44546c76d69d7d9ac34644cd28a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SGUM72301689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06912f2ea559141069208f2be7ba28316edd26f4ebeae67c719093606ec5fa8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/VNA0R2400041.
NGÁO NGƠ (feat. HIEUTHUHAI, ERIK, Anh Tú Atus, JSOL & Orange)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59715b7469885d5b017bcbd88110c405e628d1d26710f7420499e91acbea3cc9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2418913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9e1923a1107f7c913c3dd9a13081fd7befdfcfaee0ea763d8da830fb7259f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38Y2504852.
Biển Của Hy Vọng (Ngồi Nghe Biển Hát) [Tập 2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e94bceabc57fc2923eb399843eb738f4689e9939607083824aafc390e08bd57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/VNA0M1929381.