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 0x911f6ed9fb00d32f9d9b4fce4b0bbbec00bc1f173034d301805c9a33f4c848d6. 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/072ab694-28d4-48f7-941d-7ed63210502b.json and https://artists.proofprofile.net/proofs/artist/072ab694-28d4-48f7-941d-7ed63210502b.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 0x51c2bdc51360da90a689e56a7088d4485f4ad0bc2206d49fac1e797fc4a8e14d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPLS2352747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f4fcf8fb48f1fb6a6b87485c16e9f0d4679d93733a5382884c331c8c9e4be1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZWFP2355280.
INTERNET CYPHER 1, Pt. 1 (feat. PUPPY, Bluebby, 1nG, T.JACE, stillyoungdip, SUFFAIL, Minh Huy, 20th Friend, Tô Châu, S4mD & wAvy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbbea0065461d98c6ed1d77801dd1ab3c7aec632aa874a110b0b39aeee8e52a. 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/US38Y2411165.
SAYLOVE CYPHER (feat. Ricky Star, Lăng LD, Freaky, Lil Wuyn, Pjpo, Hưng Cao, Giang Đẫm, UltiMít, Chiennhatlang, HATA, Chị Cả, Ziog, Zinnine & Baby Gang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581a2960aeea8e8b0077eb6ca5a1ae9757cb7b33bc809c35619461bed2e2df9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US38Y2412654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835abfc212ebd43138b3f31c7e5ba3031c933041dbd3beb061740c5a58c406f5. 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/SGUM72300194.
BÈO DẠT MÂY TRÔI/ BÀI CA ĐẤT PHƯƠNG NAM/ EM TRONG MẮT TÔI/ HELLO VIETNAM
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a003c89a8959a4f7badc45d47d1defbeea3aecccdd0d8b25cc4a8aea263b17a. 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/DGA0Q2433277.