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 0x6a74dc0c3f74304d2ff4b9ba53a159ad6f4709702246d107f888adbf3b360d1a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1423685f-e723-433d-a1d1-97c092fc9016.json and https://artists.proofprofile.net/proofs/artist/1423685f-e723-433d-a1d1-97c092fc9016.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 0x5d749b667cdaf25b22dd344eb4a6df9c10c1b97bf2ed7f186bd70a811102633b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWR2052742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ed2cdc48e2ff56cf29b4fbb101acd72709803b5de86b84214f94d3c321cfd3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82351940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4feaddd726ab9f4447011d5cccfac5f97cab1162b4c4b4fef663ab61e4f13. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA82351943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160cd2d678e86ca294e8e697f9c61789a29a2e33c4aebeef4e21bce0989e9450. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:13:03Z), 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/QZHN62347258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8838563649f8890c94928289037b321d8f3479b094b279f3ffc8e7dd38f68f2. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:19Z), 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/QZTB92363991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6855085eab78989dd9ac01927962ef7c364fb273ee9b2285cf5025b384ba3a74. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZES72489853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae552294a2144e602a33e19a4046776e97c7bfa9db82e719d5cb5a96a4ebe81. 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/QZTAT2429741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7761496960df6b43be4072b0aa8b355cd8ec7e2a3118eb1d90fd64f3765ea25b. 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/QZTLA2482858.