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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae00e3bf165d1b1e9787832a2e6456c99e749550d0ce0c6c647dddbb9fe3661. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81075fb6-b6dd-40d0-8ec4-88f2f74629f4.json and https://artists.proofprofile.net/proofs/artist/81075fb6-b6dd-40d0-8ec4-88f2f74629f4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c124cf1cf4d6dea483f65497602eb39a41c7121ec8928f381633aa308130cba. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/VNA0M1909385.
Yêu Người Có Ước Mơ - Lofi (HITStory Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523763961c50a6bb1ac01367a45a0c90f8713e725304d05284006535986e6a18. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:31:42Z), 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/QMBZ92500686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce788ff4b5ab2c38c0021feadaee072508603f1d44e3d636d3f8209aab22b91. 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/QMBZ92500687.
Dù Cho Mai Về Sau - Lofi (HITStory Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8356f582f891deaacb88b8a8c2b4889d1258d100550e7e459fbcd8ebe46e8fd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:31:12Z), 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/QMBZ92500688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a324f813cb3a79ab8233aeae0c4ef77aa50362e15c77ca183b3dd3a1349e79e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR59R2215385.