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 0x77a0edc23575c44c3eb16e75549d443ae9842323fc14a40fbccd2f56a2116240. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/748ed80f-1f35-4cf7-b6b8-c4a457c48897.json and https://artists.proofprofile.net/proofs/artist/748ed80f-1f35-4cf7-b6b8-c4a457c48897.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 0x8085de19e1715919c1f43108ce6b450ba87df7ed3a7a501aae35e62e402af6f8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:51:57Z), 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/GBMA22406812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd7cda4b20cec4a4b9f9f7c138e24468092258ddd155e7e9dece2b5c615c651. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/GBMA22406813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e471b89ccc55cef2b2220eff566244603e63c3afc877cacc1619672e427ace0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22406814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad53b45a9c77c1d22141a2123d88bd3fc41a7cc9d95ae066b56156b66d0f6a9. 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/GBMA22406815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e963a0b99edb685ed9e49f4543a526c312795bac55aafa988f482ee0b5bcd2. 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/GBMA22406816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ddd67ff758d4938013a9b0785cfdfe36b20ca9defb0668e4b20185da39421c. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:05:41Z), 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/GBMA22406817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de336ffecf49538db581231b9dde2cbc560f3e908ddf9db80c7f73b17cec15. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBMA22406818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1d30c6ab6d0948bd1fab3e533ea039c0b172be84b6900bb0f9629a3bbd5ca. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:01Z), 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/GBMA22406819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efebe20ae2ae651b2ba2506459c26866144226de16b056243841b22c049fb7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22406820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb719b205ce471f6fe175ea6b3592a9551e17180b87a37cc37bf9b24ad4134a79. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBMA22406821.