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 0x5dcdd90941eb202bbc4493c1bd831f9863aab71f0d25abd1caf13c5f25d2f00b. 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/4f99a418-5158-4d29-ad7a-57961efc37b7.json and https://artists.proofprofile.net/proofs/artist/4f99a418-5158-4d29-ad7a-57961efc37b7.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 0x59f60b8d1cf49fafd9cc7ea5f20f2dce8abe293a53c118fc3e8919433acaa6ec. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:57Z), 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/USHM91657345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073125cae661aeb08100b05d85b2e6529ede0009db9a02510409c639cd774a5d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM91657354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fcff74f7250c6e2201b3761e0d56d61baf1d64dbe5e98c52d8b56c061f8df2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91620739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc253ed497416251f976667738056da00362439e0c4a3ab3a0b3424147dfa97c7. 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/USHM91620742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb638fb57a829cb61fd5696f5be720df3275d64b759bc1ca5bb08cbf32bb1b7. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/USHM91620745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e412429ed54a409405604beb6e80a371f54c8ec1d6ff4e708741d3a6982bdf2. 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/IL6191801214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e11490084c194507bee754e1038d78cf764bbff5ff5437bf4d1853508d971bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL6191801215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350e57ac36f9bd290f66bf8fe7afc2f8790d33377f604f5243a83586ac5ec3cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6191801216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2c309bb4efae0ebd359b73bce6dfbcdf3902ee3d506c81f4785ac971719c5d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IL6191801211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01874c90bb7a332296a20b6efadaaccf5a96a0b77188cef2e85b8d0dff934864. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6191801222.