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 0xbad9903b13ad5d1bb72dfef85b1a1cae1a070acf6000de596d08a100cfdec58c. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19b3f4e3-f5c3-4a65-a427-87f3d4d62f1d.json and https://artists.proofprofile.net/proofs/artist/19b3f4e3-f5c3-4a65-a427-87f3d4d62f1d.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 0x182f89538d09d1fc64de3754984bab2f74c1fa0adb9aee7ce6397ca61d8c389f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWDE2599311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46bed1aedc2142cdcb2300c8abec62ff4bfcfa6bafc64be863d0e24cd782fc4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:18Z), 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/QZWDE2599312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9189fed3d2eb7734130d97bd5c0de396f27b86dc1b22e6a2aa95ef17a9c4f9. 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/QZWDE2599314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035c87a32e3e9b4d3bcdedaaee18d00411cb3da3e6103d87f1e85007bd75e85. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWDE2599315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6303dfa48198e6cfefcdd849783cf02ef33ddda7c1ac600ea848df8740a61ac. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWDE2599316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc29cbf926b82ba91a76b0481f87c5b6c19e3770623285ccf6b5d48c2256cb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWDE2599317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d749c16104ebb29a09bae1d687fd67c7ac2b7bb761b520b90b9ba68ffa4194. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDE2599319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dc10c5fabfe0a234aea4eae0934bebe79852496b1b3803ce7a9806314eadef. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWDE2599321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716903b1f2ce865bea66cadb3f67f8c3428383101f6a977babc90350d9de616d. 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/QZWDE2599322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448764645d3a5d1da629d763e07818a8e9d09b34f606586d7fc08bd44b99a504. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWDE2599323.