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 0xe9a5152891ead5b262fb3df3fb7a4740e77dc219a2417da0a147b3732fd09578. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04dd4acf-585d-46b9-8b97-f2df115663fc.json and https://artists.proofprofile.net/proofs/artist/04dd4acf-585d-46b9-8b97-f2df115663fc.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 0xda6774205a690e8a6c891fd2205e5ac3c23b6b5cad314a794800a165a68965d1. 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/QZHNC2478154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69ed279ed2de38cd9a513ed9c90cbf4ce3fa075e6bf2af877f574587a8ac289. 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/QZHNA2555046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54030aa264ac3417b4f46e6b8853bea70dc8f8f0c08567cdeea4c6513771b96a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMER2570369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558e18b5d0b634f944876efc8a355386cca395929f019aaa852977c5ee4ea285. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFQ2584390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec236f3044dfa465b41ca6ff60141dec02fd6628836a7fb6e7ebdfa426332ea. 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/QZZ792583909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc625aac5b31b0b5a29ec91da1b63aaa60ae1726cc8f382230a2961eec29e6877. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:29:46Z), 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/QZZ7P2502552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7271e0b490bb82f0721837d2590bb52f6b68652f748a6efb3b948b39652eeaa6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:03:11Z), 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/QT3FC2505661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eff16d261c1fd8f5e7e54c80232a82ded1464c4788d0952f595c4ed0a0fc66b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM3DF2413818.