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 0xa625507fac7001fb3c8908bb20033e1d73285fb65d23f3caa0e0295c55335b0e. 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/839b33f7-7f97-4781-af32-473249c22e2a.json and https://artists.proofprofile.net/proofs/artist/839b33f7-7f97-4781-af32-473249c22e2a.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 0xf64e581f660996d0d6bde09c479bb501be300d86c540d225dd2f1207829c0167. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:42Z), 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/USQY51700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999aa0b62fa7725dec4ee10b0b3a2850f3f4a4745cee84c445f1dd4fa851add4. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:01Z), 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/USA2P1701671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562375d73cb8ccfd94726cc2f3dce23941f258f88f84e1b2411e7e3645e25a36. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2P1810367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236d427ee88279c7a3a8a317ac52457cc01074e2e7f3213ea0f5d682b006e8cb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZAKB2002418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbb272b40bc44ac277865835eec1262777dbb91788bc11e9e6df7bdd730ae02. 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/QZK6J2148434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132f16722e1782af0ddc860662f54ddce81685b6fb02e59d06f7f43b224ec833. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZAKB2001266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa6538665b09e2af3f8ea5d3856597e0ec9a614873462c585bf92ffce25e669. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:47Z), 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/QZNWU2125438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6b5f79bc7cad6dccf65f93a0287ea3c53a226ec67584039603f53111e354a6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:17Z), 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/QZK6M2230492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c397d355232aa53c7ca1ae9cd5dbb845c6290a6005c6c91b6f53e65a0568cc2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:23Z), 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/QZTB72225194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c397d355232aa53c7ca1ae9cd5dbb845c6290a6005c6c91b6f53e65a0568cc2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:29:47Z), 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/QZTB72225194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9771c7de02a19a97897166d01706b7301b51fa768e1ca498e81def240f8eeae6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEEC33501002.