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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ccb87f501737998b027e87c249883ee6df89f16cc8df335fc9ab6d530daee. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87f1f5ad-d892-4005-8307-7c174b121ed0.json and https://artists.proofprofile.net/proofs/artist/87f1f5ad-d892-4005-8307-7c174b121ed0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181bd35154e0032ea831d4aa6c562f54f0b692555274ec52a1c8be9e28c204dc. 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/UKXN22551000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fadf6e4f4502c0bd3b1c258e2dad397dafb136bf1b2493110d92674448afdb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22550999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec48e9c44f074dd741f6fa0c0dc8e799c94e82ab6cf88f6a45508cfe058622. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22550998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed25121972f224ac10b1947417c38d0742499ca195f5637f6f82b0b2760fe306. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22551003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec595042371c5cabf11ee29fb4d2a5f472408b4308a832ff7bcc3b1a90638f0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22551005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdf41e4690fa61924fdaac8027461eb46f7a606105265ae989386a5a0f52b3c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22551004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67fdb33d31801df61d39d39cab0479d3519bb9f9e34e61600469d73845ab06. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/UKXN22551001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2152dd6db07acfbf5c28e6cdfe17534a58bebe5e2c5437232024476fe0230401. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22551008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a25d7593aaeab7a0946348f2988a6025bcb523d12fd7132fcdd9a2bfdbdcdb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22551006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ba415e66847001f59ce2f115e76ce599a6ba19d8b03a9c31247ed50be2a274. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKXN22551007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e2de05897c97a823edda5f1ef4aef6afe06090c7838bbe0477d1e455c80661. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKXN22551002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a80fcd1f1052aa0dbcb4f99f3ffa46fbd7ef2e97a60b88caee18c2c10316d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/UKXN22551012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d8c8e6c64a0a8a333300f6898ca984b58b6623cf62494b117fa65adf02afc. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/UKXN22551015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936a2dae8f695ad2348b8ae612674d1b5c3f562bec8cfd98c4ef3ede2d0fc35. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22551009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095789f4539808cb8331a0e31969f31a094cd4f817928ec670286462c969bb6a. 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/UKXN22551010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1215ede36b2a58ca8a6fbf49884f85c090c24216b1d36c6a7222cf5bb63d063. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKXN22551013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69de7a4135d269ccaa7c4d235c94b36c958155c57792c06dba9052e6b9dc0ec. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKXN22551011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c784b198114b4ead95aa43c1534f6ed321fc4a79e3dd5734c8c5af2b386b5e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UKXN22551018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a2bb2a2e48dad1382d626d1fe10bc02595511f5b5e0f1274f1df06e275044a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22551017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876a9f62ef660496c7ffb97d2d424af85e5de096e7270b1c3eeefa804fcfda9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/UKXN22551016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f5efdaab9d97198358a9b55256d37fb0f56fb8b0c2d0d1c2ef05eb11220fa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UKXN22551014.