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 0x6eb7080ed53c670513ebafc02091309d84520e12a3b7ae126dc3e434b45ba70e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88befd5a-5175-4f9c-9314-d4159ba05b26.json and https://artists.proofprofile.net/proofs/artist/88befd5a-5175-4f9c-9314-d4159ba05b26.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 0x2759db4ba9b6a2dbc0e1dd16ee116df3fd5dbb88ee49ed64591fb2c8ce8f0975. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBB2309399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751625872c5f380eedbdfd2ba1b5f12633bb349673484b4eb5c0c5079eb7cb09. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBB2309400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa179202eac7599441d3f2712e1fa379d221528851b3d7aa81e452e4a0ab86f21. 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/QZTBB2309402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c2a429535e4b080b824dde066bbb86a9e08911f40c8f7efe00c88e67ec79d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTBB2309403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a715ec775a452d79ef36c2e05b3722c37da898518be3f0f55b0a9f2560583ad. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTBB2309407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769851fb2b33d06b79cbaebd172d334046598e101c7f18405e58e50280f87e8. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZTBB2309408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78bb4177375592ed3544c9577c2930eac0182ef8795e45fdc39322e3ae98d7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:47:36Z), 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/QZTBB2309409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1068182acd1b36dbb111cc045d6acb5a76feb22b5828ecc93ebfa8546c24d77c. 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/QZTBB2309410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4786cac97871734754bb11681c4e18efa6b31e8057e787c42667439dcb95f07e. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZTB82389195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68474e5236e2d05025d64cc6bf14d094bddd0e7d6df8430933e63cf221592255. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB82389200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d8156dfe4494d80fdfe67d5a0f168d0ade200b2988da718fc7e7f1752baa15. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB82389205.