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 0x0857efca8fbb8c253d217d5aa98d3433e4fdc68984c7d1177a7ba95f039fcce3. 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/73ec1bc8-a421-4542-a14c-3ccf872f952e.json and https://artists.proofprofile.net/proofs/artist/73ec1bc8-a421-4542-a14c-3ccf872f952e.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 0xf76d7413a4b21253c30ee499f785c694cf5479fedc9099f6b65302c55efb0184. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/USJ3V1198568.
Hãy yêu nhau đi (Tình Khúc Lê Uyên Phương) - Lê Uyên Phương
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e956e060cafe4bba88cc0ab69161ec500d171b1087b6aae2c69f82893a553. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/VNA0F1708494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403e0fbd4e1f47ab151cdfa27181ac3f18a6a4cb0ef7c279510ab0f76b06673. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/VNA0F1708496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74f28fdfeda76ac5bd139e6a34759ffd7af684c5f60278a77689a29a202f7fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/VNA0F1709302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8130465baf6f646ddf5be28b111948e49133f25400cf313ac45cfb79a6706871. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNA0F1709304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d4d536f59943209212e63ff5c584d6c275fe351aa2e60441373fe66bc02d0d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/VNA0F1709307.
Hãy yêu nhau đi (Tình Khúc Lê Uyên Phương)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c935a691fa78133a34eb43c57eb3b84e9c385c9b0e60e779d9078cd3c39c2dd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:21:16Z), 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/VNA0M1934464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979a1c7c2f5bf2b1f702fea28699b2bc4bdd50f3f032c12508f3a1d2955039e. 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/QZGCD1803336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55743371642bfaa1e3900d6e7c1144989478dd2a6396e61e83612862072bdd97. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZGCD1801940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8c023f64010d9fe64c8b7ce2f0730c94681bb6249a00b8f07d5fa27535f298. 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/QZGCD1802589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f77509f728395944689aaec656505826668829c7b8dc356623c0ae8af784ab. 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/QZGCD1807044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc763420cbc8f47cdb9688c0e97cd7028c7855c5e94641ffcb7762b7560642865. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZGCD1807180.
Liên khúc Vũng lầy của chúng ta - Tình khúc cho em
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474df0640b195d24edd68319bd055545f31dc0c402e3402f1310dc4b5735dd9. 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/QZGCD1801835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa466c6ee6e80b2a386608353e2266311d43f51e3ef0abc59fbedd3ac66b32d6b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZGCD1807450.
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 0xc171edd6d55088d737b817b378eda1b2353f0cbcbf248f50b69b29f5530a56ec. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZGCD1802753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ce339cfeafe1b1edaa7db37f4df5a4ddcd8cb3ff7b2c788cfe8af00a6a7501. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZGCD1801839.