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 0xf2dd61be0fcfb887da88efe5bea309e0c304f31bc5668cba95b09faa373de773. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6237573-4c11-43d7-a886-aae3fdc1878b.json and https://artists.proofprofile.net/proofs/artist/d6237573-4c11-43d7-a886-aae3fdc1878b.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 0xf0b2a00403f543e1ce30e704e16bc1c3de9c483f71fead6319963bb80185a848. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:53:58Z), 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/QZZ7X2518895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6a1e0ab9be72c286cd7f51afae9dad4d745153ee53a0fe86af3e71a2ff74b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:30:51Z), 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/QZZ7X2518900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5365a0a1d1afaec8355ef0c19283cc84e4f1fb6fcf5b15b7a155b435cda17e38. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:32:47Z), 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/QZZ7X2518901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bedd2c7f4ec78e27be6c39c495beacedd8e28dc2bf18ee92df0f212a731af49. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7X2518902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9987d243ef8c497c486c49256cbecfae074100efb0450c17f2474bc2991146. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZZ7X2518904.