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 0xf136c3ad10c8a205b9adf30341deada5471b6d0512de427be382c6a5003a565c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a892f96e-0f14-49ba-a112-50cc7f09ade3.json and https://artists.proofprofile.net/proofs/artist/a892f96e-0f14-49ba-a112-50cc7f09ade3.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 0x80ca52bd9f1f736b5ff3f754c99d5a23ea15e6580283412350a8063e19e4f15d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5752460926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10d463b05caf7a16505300ca8c77778a86458bf7b04515db01d3ee9fe3e7a68. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6QE2483384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91278e12c188d48e99e0dab800b9fc110021030132097a759b57dd82cc85d833. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SE6XW2417806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9becac19556c72f96625371db2f443a1eeee160c1d1810cd8f464adbe6a6ecee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:01:51Z), 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/SE5BU2509135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d816078f7ff5f9b82c001d7d7900c1945aa9b497a52407b5a4eae5dd1ce49fa. 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/SE5BU2542374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a8dbb43629bbbdd10c76f1c5ad56cad01ec51db4052b6284795780ff3a57f3. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:54:56Z), 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/SE5BU2598828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636644fbdd0d2febe42bf3304d878a1dddef7cb7f71868c78a97150a8348e31b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/SE6XX2537431.