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 0x539b95cd95ea023e597ea8174528c23cb50cdbd149b3886eadbdfcc577392df4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efd165da-7712-486a-8df3-afd60d4b5390.json and https://artists.proofprofile.net/proofs/artist/efd165da-7712-486a-8df3-afd60d4b5390.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 0xbf2df2910ce4138da56c3fdf0b35aa0586b654857ef34f6b78a588b7375878f5. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:02:06Z), 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/QZK6G2143585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48902045ccf6dfe380e6634b700d916218b3dba0680faaeab86bad3b4e109ba9. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6F2117780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb689b48f82c284127b0e1023a2b8d849e97f937e33eaf9f948342c47388f6a. 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/QZMEP2379231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a898b109d8ae4a7a0961cf5c29574a209684db44a9abf75dbe1f5024e940b9f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTB22324896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3456c013e100d1e3e9d897db0f879f6b333f9d456aa01f71a7ac8b472257c80. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:49Z), 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/QZFYZ2414033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe646a83bba5fdcd537e06f4270c1233219a6ac9ca5533174fb318b4362a598d7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFU2573327.