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 0xa466dd4cd9c4e647a190597779b0fe807af9259dd37890fa635e817098d45376. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e234fb14-4c0e-4dc9-9429-5e8457619c05.json and https://artists.proofprofile.net/proofs/artist/e234fb14-4c0e-4dc9-9429-5e8457619c05.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 0x41e694a95665693cde96b46d8b0b3e4d34787c05823bb92088d4e0c734f37995. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:33:50Z), 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/QZMEQ2471292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5881b39a743b8b9493cd1006d709c7f27d1ac07ddb064a6a222fb212c07dd1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMER2487468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7866d141496acca9517d318b74b761c58e6b5cccd0f23c4a37bfbc93e8a7cef2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWS2428902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea329df66558458bd1fbd7af7ee7f47778067d5d39c92ab1e3229374487e7905. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:02:57Z), 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/QZNWX2409359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073e4ef7dd98c268d4b91cadbf273d7367d490f717dff180d8b140a94b469542. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB92420006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72eaaf345780d59be07dbb670aad53f2637c296ee1a0584c7fc272a0d1ddf074. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFU2477514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb902becd96c1cbeb6d9ac7d1c5b2678fe5b3103da093fa5240f0982748746e6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFU2477515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b38f7d8ad34a7a2dd52e28cee3396566846c2ca85cbd7665d91aa00d31c7f02. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:47Z), 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/QZWFU2477516.