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 0xb251b282851fe3de85fad1cc6d46d69e32668cd09a78385a7c7bce4332034312. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f601468c-bb97-493b-acc1-918d20d292bc.json and https://artists.proofprofile.net/proofs/artist/f601468c-bb97-493b-acc1-918d20d292bc.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 0x6aa51a18a490ea9fa3f501a9261aa7f11e22c0fca4ea3012d5fa1076fe6f563e. 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/QZW9L2410345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931b62f8b8aaae3960ff0473d4779d9d46b08481413cba06cae725d993813ee6. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZW9L2410347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc082adcd61b0f0e3ddfdccd4c787a5a2f72f1b67a76b7c16c1143f6dbb8a46. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZW9L2410348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f24394a985d34e9b5999ff9bec5699e8717bddc38f50e6b625301744e488f3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZW9L2410349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c1a32684987dd93a1dd5306687847c4b24a480c0836d927ac5c2f66f77a8b9. 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/QZW9L2410351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3821129cc38ecd0fc19f5e0c1e36ac7c8579a9f6aa978b9e11489847992ce. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:56Z), 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/QZW9L2410352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cfcf6d77340a43768b176315a12979ae3f1bc705c6eb24c3081aff1409efe2. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:09:26Z), 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/QZW9L2410354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec8539ba4eae40de9f5f0762e8544ab000c37a2bba3b08524104cbb44ca42f9. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:15Z), 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/QZW9L2410353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33eeeba105bb073cb479d3e25be91bef5c9110e6eff68cec7934700d04892ab1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZW9L2410355.