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 0x9237bac1a1a2022faa65c94324fc5342b444b3f972fd7cae409cd9eaeda4945f. 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/065d9166-9477-487f-82ef-63605e094a20.json and https://artists.proofprofile.net/proofs/artist/065d9166-9477-487f-82ef-63605e094a20.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 0xf59aa7aaf7e6fba73a12ed3b4b0f6ebd8e1476432df387d426aeb6fe2d74bb90. 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/DGA082336094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b8764ccbad82c8e2428321412e35b1342ec7c50929ebd4c65135c4d2dae4dc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DGA082336098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ebf69a855354f5598f829ccd1db83617c10ffb2185fc6f87069200aa218d43. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QM4TX2456619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8a41de637bfac0de90d37eb4890dc256355786a857a209eb0bd42ebaf6e5d0. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/FR96X2485574.
Con Tim Anh Thay Đổi (Acv Remix Speed Up)
Nếu Em Muốn Chia Tay (Bảo Châu Remix 140)
Người Bận Lòng Người Vô Tình - Domino x Việt Thereonn Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f996f9e9be1fa22fe85c16122cfb5dc71cab7613e35bdf59ccf5a5992ae327. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0L2455672.
Thiếu Em Như Trái Đất Thiếu Mặt Trời (Acv Lofi)
Thiếu Em Như Trái Đất Thiếu Mặt Trời (Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c356eca2e780117d114f2b349b2ca0a31178b67f6239699bd2e5bfe63865d59. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA0S2420190.
Con Tim Anh Thay Đổi (Beat) [AnhVu Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f679c39b8b213118fff27129a236391bfe30b4ff2fe6ed185f4e9a27e284e. 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/FR96X2571221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b376d69b42888090977976fa0ca5c933510af193913809e1e2f7555ffa49ad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX202547278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7746dcc7a4ddc4e0761c92a7be97d78fe85be0075be958cff198fdccd1f2f245. 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/FRX762593911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154dc28a254af611805cdba0b8e4c5e9b46c0b3e6c9ced8f479482a76649a91e. 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/FRX762593913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be04646e2b0b35b022433bbe2324206ef60488ae0008aaa03b212ef566cca1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK6822513958.