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 0xb19936a8ced98c2088985162a6031687d25e73d18b9fbb1d42446f85ad6e93ba. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28a1077a-5c37-4c0d-9b90-bf2f5bae4df9.json and https://artists.proofprofile.net/proofs/artist/28a1077a-5c37-4c0d-9b90-bf2f5bae4df9.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 0x6d64a57ad494c0698df49cc6c56b2df6de9dd59774e9431edb4839609757de62. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:36Z), 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/VNA092003922.
Khúc Vương Tình (Sinkra x Lee Ken Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f33daf994b950ee62bc9d046115d77c8f9b4a59315eb36cfa4fb9e794e7e85. 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/QM7282385810.
Mối Duyên Trời Ban (Rap Trend) - Em Muốn Đi Đâu Anh Bắc Nhịp Cầu Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fb4aaefef5f183235cc55cb452f12fd5fa2274a7d435ab5c2376d862a559b3. 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/VNA1M2292020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82232a61d4491ea99a8cf3782348026f974baf9c468ee026c1c7c5b01c01dec8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:24:37Z), 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/VNA1M2406708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84c2f9fb25a2afce490a8244e7533ab3b55115f4b1222466e22f6e0656f3caf. 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/QZYHM2423453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dde4fee4050480b8ccaebc72ca87201e71953096d58b332a9982f4f7c008ca6. 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/HKK972210822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef928bebcaf68d7fde4e4c0f075f04f2d0edd96ebf92d5ecf9c1b63cd9befd62. 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/HKK972210824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6541a8edc1f982728d58def10c37b909c130ed15107a6dcbaa5166f5221421. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/VNA0F2406743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d7eae15752fa0423c31d447b747444e807eb918df649ac6a4fe58b757d9da2. 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/VNA1M2400433.