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 0x264f4c06ba2f4e002f6c69d35ac7789aa8bf88481c074d7bf4df18899568ef67. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c4f874a-5b31-4545-a20b-2b7de0e4ea25.json and https://artists.proofprofile.net/proofs/artist/2c4f874a-5b31-4545-a20b-2b7de0e4ea25.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 0x88c8b5253545906137c97fc4e980d7e2a64b0a734c3db923ad3f001004a12885. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ESA011714401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfdbbe5f7e6d71f500c156035b92e5d554af0d8412b70e5cc52fb6acc38e47e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:51Z), 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/ESA011714402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91749fddbb9f50e09d6e6b9489d612d7f7a8734c7a4b281490bff47073c48640. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/ESA011714403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e54a77c1595e62eb2de97b606b403dccd6a36bfbad079e61c60c1238234ca87. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:57:14Z), 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/ESA011714404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f90d969d8b90d692ccedac28780ea103aa58ecf41fcf7233e074c561a40c95. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/ESA011714405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dec9828751671b7eef8bfba68f9a153b401740876467a78f79294903593add7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/ESA011714406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc97fea19a906c07dd2c060b551bb76925af69e97e981c991588b679ac19278. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:43Z), 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/ESA011714409.