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 0xa20fd1127a28a4aa22d3f5b0bb86bcdf2baa530bbd587e0bacaa0c4ceb84f224. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4c1437f-9696-47a3-978b-9a75036cca35.json and https://artists.proofprofile.net/proofs/artist/f4c1437f-9696-47a3-978b-9a75036cca35.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 0x22016b0b2f9e2b4ef0b1023515351c34edd9689fe8cdedc461486df2c7fad5e2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLV62001524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ecc905670bf827b7c449754addd63f4c65c6f7c61ff4c9e65e80292063955. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEGA22303851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a30422a12bb6d4d87a83175869772049a8751680140574e97f3564c3217f90b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:46Z), 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/DEGA22404129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232ce9a0a88fa567dd97529f742e99ee4e02e2258b88dea8625e4dc4249c5fe6. 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/DEGA22404158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7725288696dfedd7524e9f756b15a701ec15c329a0af6c379277352ea6ac876. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:06:01Z), 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/NLRD52352478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d70831dfcdde26a35cb9e10deaa87cfcf9661aff450c0a2bf0aae48a00899. 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/DEGA22404223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc399ece4a69df2b6eaf8480b676bd29e1f9cfca1d70c5774d83b266a5899b622. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEGA22404250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd7e6c3cbacfe4ee8b32ffe97f5504af1f652ffdeecbfa420cc8d576b70bf02. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEGA22504458.