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 0x7755872f3c5d3bb536828144d574935f10209cf9859c5dd4e45accdeb28149b8. 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/e0cc655e-229e-465f-9806-df9386b10763.json and https://artists.proofprofile.net/proofs/artist/e0cc655e-229e-465f-9806-df9386b10763.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 0xd778be393ab683c25c413e399dd9275040a160b89814e6c1085c8239b0abc9b3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:49Z), 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/USCGJ1507530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd691590ac1fd787ec8ff01ecce3efed59af0c46131ef6501d36dfbf8d2107087. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QMMGW1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d965a8f7c96dc9a20dc73c772cba3ef563391a9445d32a0ac1f88a3aba463c9. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USCGJ2229871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6a1bf52b8a69ea0fb2703fc37d3001c25dc3bcbc1a4761cf3ad12dcc5fadf5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:28Z), 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/QMMGW1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff132be9b0879846553c5153758bbe1e3ba6d5374ce008bd447c9489f638f30. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USCGJ2147528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6fcf351f6c1d584a0ce510a44da9ce9f6cc94cb7964c595ce83ae7a9c4b807. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBKPL1360973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0165b31450e4381235e3ed8b45aa8fe25c1fef7559420346ad9db3635eb80. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZNWR2594408.