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 0xbac302cdb194b1a6b8f2146d3c7edcbfd4c5e61d3fc0f2c29621ff3ae450ec13. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/338fb5d3-f409-4893-99c8-0b53d8b7e658.json and https://artists.proofprofile.net/proofs/artist/338fb5d3-f409-4893-99c8-0b53d8b7e658.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 0x9df68ce68aecc422e08e1741483f0b8ab5938fb1d8d54dad2b3b1fd37d2edd02. 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/USVR10300216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad33cfe4e7a58b9697e731f658856bfb8c33b084f94bc2734c7926504bb82633. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USVR10300219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffd544622c32a2dbece35c849b6a80e8f2b2423658c27dbe3a307f5454a300c. 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/USVR10300221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae45f42e70a38139b76f4ded567a15c747f36ed454c0b8f92f03aedc123c4dd0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USVR10300222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e16374b17210a09bd16c7e68c00003610e7bb079a831393591b28476e7d86c8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:33:55Z), 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/USVR10500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7ff6804e168b6250d78a825d1b892a78befd0aea5b20e57b2fe2ebffc1370. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:54Z), 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/TCAGB2260194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01763fb26e2e91f202dc8b2f19a284b5a27dadb6fd87b6d1a3e737638d2c00fc. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAGB2260204.