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 0xdfd12f9cb3931a8a363b379758b239b5a32a27b176dff35d4262fa56f390fb7d. 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/e6852285-4333-4587-90db-7f96cbe9e5c7.json and https://artists.proofprofile.net/proofs/artist/e6852285-4333-4587-90db-7f96cbe9e5c7.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 0x56e26fa74c5f03254abdd72dd1f9bac917f69187c71d8b49953f028780e62fbb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HKA411800363.
Nhớ Mùa Thu Hà Nội (feat. Dương Hoàng Yến)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54098e127af4e47b4aeaf92453a13afaf7d161ecdc222ea072d1f391ae9a0ab5. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/VNA0R2000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541cc5e2e33818d3774ede68ce8d62af604c1b7a82ce20ba9e336a4e8370c259. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:01Z), 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/VNA0R2000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b1af958a4e3720ccd9429384802fc6027f4f1e95427a1f08e9d9a7ae7c37a9. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:33:37Z), 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/VNA0R2000372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de64cbe2991aa5efc84b1c2aa4662c66d60191ee0886dd650af32e0b18a65b9. 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/VNA0R2000668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b456f3f0ed0735ef21b996d67ed7682d8ed0b1334d5661c972b09360c36c948. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/VNA0R2000747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631fb13148697b7c422ec15c6678fe199f2aa673602e5795e3bc45aeddd2ba7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/VNA0R2300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107e03d238c7bf49e0efa54a8f42571ffdb6e68f4e02864c991a33d4daebbe41. 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/VNA0R2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3acc027cdb880ae83b6fb7d72becb7fc18a7b1fc9056bbb478e2045e633564b. 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/VNA0R2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa631fb13148697b7c422ec15c6678fe199f2aa673602e5795e3bc45aeddd2ba7. 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/VNA0R2300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46344702507596b58a37c8c885c61832e7d3231ac9fd4325e3d1b91dce67bdb8. 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/VNA0R2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0ab8119fc8dd58283c25ecdeaf25e8024dd2ff70a877939557f4582a39445. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/VNA0R2400109.
Ta Đâu Một Mình (feat. Dương Trần Nghĩa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d38e127cc1f4669a94b8be56f1331db354bb1984a423b9e6adcdde3e314bac9. 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/VNA0R2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c0512721b3bcb190a96a6a60114f09da38434cce9221e3016eeb1e87710788. 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/VNA0R2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08ab509cc510df2e062dc8813b93b5cf8e0fac4abddca2efdb7bec2caec8583. 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/TWA472005001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c71cd3b44d7200747912d746192bcd46415e45f2cb63af352cf9228605afb1e. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/FRX282113082.
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
Tùng Dương 20 Năm Ca Hát (Live Concert 2022)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b91eb0302a22a8170696f1b95ca89b0f872b6c710a6082658cd1f20a97e2c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR2X42359910.