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 0x7d9157dbe6e800a1a00e1544539c1fb2ae1907fb9b5036f00d45c80e82954f81. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e4e4c6c-8e6a-424a-8b17-727ce6ee6cdd.json and https://artists.proofprofile.net/proofs/artist/2e4e4c6c-8e6a-424a-8b17-727ce6ee6cdd.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 0x0e197111a0bd32b6939e48ddfc113f9f81b206961c6c7868a500c7985c41265d. 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/QZHZ51957343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd673815f7f2d131132f9803b7ec17b7c67dd3ec58ffca39d92bc3771740a25. 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/QZHZ51957344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff25b5e3efaea1cb93562ce7b1638fa2a4cba0baf3c26c4d243c8eb1da060eb. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZHZ51957345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bb1d131909a5da6fd81706141c415d29f515129736b08cb995e91e9392e901. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHZ51957346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d5c73f5ea6ab3cf4d142e1eb95a04b68071d173bbe02fd1993ed030a598e5e. 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/QZHZ51957347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb6fdbd08e61152e213f99eb7f3fe1fd56af5ddb4d90eb29ded13db80783032. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:00Z), 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/QZHZ51957349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b283cd73ce2e9f27cb4803b8c634458ea7b9f31f32cc5389894a936c61fdc1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:48Z), 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/QZHZ51957355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb089112af8c8cf8805b0ae7bd1bf12a06067d3dc85916bf6aa13c931c01ab158. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZHZ51957359.