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 0xb1d13c3d9fe6a9b901ddd01bbc2da095e384cb5d12b283fae30cd033578c3a0e. 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/bbce7cfb-6a96-40c6-bf9f-3216426f5347.json and https://artists.proofprofile.net/proofs/artist/bbce7cfb-6a96-40c6-bf9f-3216426f5347.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 0x810ce6ff4e074de67f4f9b35dde43ad5c30a96c0b39a36dad5f8beee0eea0597. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA0P2332463.
Khi Cơn Mơ Dần Phai (feat. Tez, Myra Trần & Duzme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7574f39b7c356895515d56e0de1257a77eb18fb429a6edc9a93790b0a654e78. 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/US38Y2417297.
Enjoy Cái Moment Này (feat. Tez, Anh Tú, Vũ Thảo My & Nhựt Trường)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a6afa0abfbf114c98636b24c79078d25beaacf399d39a8f6b5d1cb8c7202f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US38Y2417296.
Chúng Ta Đều Là Người Chiến Thắng (feat. R.I.C, Đạt Dope, Yuno Bigboi, Lor, Tony D. & Tez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0f83b593f7a1578c4c6acfba289020a72559d5366743d04554c1ec64a67a9f. 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/VNA112000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd914bcdd8dc949a422196856cfd9ebe9cf36c83624015d04b136efcfb5ba48a. 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/VNA112000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab58caacff404cae4b9c4d5e4f6624f658255b18b1f5b92fd3cabe6e8b771f4. 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/US39N2310741.
Cơm, Áo, Gạo, Tiền (feat. Tez & Ngô Lan Hương)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d391337ef500ddcb4a2b68fe11a1744a62cd76a4565aeec1870b5a0c6c6bd27. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US39N2307750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ab367b59c7173bc0b58d84377cd23223ccd453b4fb2bd7a12dbfca588726cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2301433.
Khi Cơn Mơ Dần Phai (feat. Tez & Myra Trần) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6803aad2453884816927be4b67e4a7f87cb3f6f7483b52f7e8826a1a4d905. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US38Y2415232.
Khi Cơn Mơ Dần Phai (feat. Tez & Myra Trần) - Lofi Quanvrox
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b263ce671323fded5d5183386ff2cc086f3b76ca014fa74095a57a13de1e94e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2415587.
Khi Cơn Mơ Dần Phai (feat. Tez & Myra Trần)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba02098e2100dabc8ba90c05974cf7ca91d955d1524bea805cb7d3fd84fa6768. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2300016.
Enjoy Cái Moment Này (feat. Tez, Anh Tú & Vũ Thảo My)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38220e00ededcf6d42762f5193a05438d1cece750147b4090106ed0e705baba0. 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/US39N2312119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a401edaa8ffc484d52b4b8c8f6f77627ba5e60f759deee6e07c23a0b27510. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US38Y2417281.
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
Bỏ Thế Nào (feat. Tez & gung0cay) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e6219455fcedd238e953d2e90824ee0d68dca29472dd09de4ded7d12e738ad. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US38Y2415229.
Khi Cơn Mơ Dần Phai (feat. Tez & Myra Trần) - Lofi Minn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5080c304d06e53dbf9d1e003d32e2e836b3333bafbf67ebc923b759d5f9657. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/US38Y2415530.