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 0x1503ed117b7af83b5301a3c91ad538cc212b48f6169c8fa6d7c3a9211de6c00c. 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/20ddf0d5-30cd-4dee-be23-fac8dfdc338a.json and https://artists.proofprofile.net/proofs/artist/20ddf0d5-30cd-4dee-be23-fac8dfdc338a.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 0x89f275c46cd0290420024810e6c3878c8f40fab479bfefd637237cbcf257baca. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRIDO1911465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235d45e1cb01211f1808b01a43d72e3ef0dc8437da12ab838a1643a823404bfc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:30Z), 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/QZNWW2066129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8908ffc75949a02ffce129802ae2d955c70a298d40b9e37f21c9c708c2ebc5f0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:25Z), 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/QZNWW2066134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bd0becf086855857e6791263d5197967c39a1e45b2d59dcd4fc93c7e328053. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWW2066135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c26ffb29f408ae27310fa2ada92ac7ab684dad90de6a7365cfebeea9395b41d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWY2086630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa43a735f4d36edc3197093025ae8bf947f16738095b0a7333e178f047988d4d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFYW2162928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd105e5f84db7a38a6a6bf3dfb06fc302b504b450c0eff9464bb3577eaf54f107. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAY2345939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324e7266936d06730e543dd68b65c8ab429dfa3698e5fe8f3b50c25b7e104de8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWFK2393948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf325bca622aa42be28cea85c13ddf45032ce8cfc21705b01cbab8c74f9f48054. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU6545805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34d68b451038002eb7cc3acd6fd6cfb1701b7f767e6ed6417d0b3ebf2910ae0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK1841959.