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 0xf46d3b84128fa461145b618184e3dcad2099648f058c485c363ee6d71294805d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0f295cb-3356-4500-97c5-4086dacf038c.json and https://artists.proofprofile.net/proofs/artist/f0f295cb-3356-4500-97c5-4086dacf038c.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 0x914c6166891b7ddba479c90aef550168a1709e0ad7a7d24e1c97692379a24ea8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZKSK2230922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e9873322b9cf64619866c93029e99a6360290b692af327fd57e9276b79b007. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:16Z), 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/QZKSK2230926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e1520471d7b94b3300beabc8af97aa9a6418d2ff8ce626914f353ff50dfadf. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZKSK2230939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f4b87a6a9fabb655c1871cb93baff0c5c7f61c5380851ae92b9a625b9d3327. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZKSK2230019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8a038acda7e1375e626ef1d50e7689135998f1808a3afbb46dee65f6d1658. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZKSK2230020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73ba07995f367b6a7d807636465d478e1b8e66caefe64b0f781bd65c50fa3d4. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZKSK2230022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc08744a053ba85427f9ed949a30ca8d378f55932e2e6fd226731a42d1981cce. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZKSK2230023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b7057936a6adb2043a7618bda4d27769028fb35f074209c764bf6fce50595d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:01:48Z), 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/QZKSK2230063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f9ada36a0610ea665368d439777a29da7d7ad9236985a34acb00048c68ef9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:15Z), 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/QZKSK2230913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b89de640bbaf722c8fda038d476d6590731f4f34ae20d836e99d40348a5431. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:54:08Z), 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/QZKSK2230084.