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 0xe1667cf1e231cc90c4496615cea4d9f9c713bc425d69dcb223219eecf75d824c. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06b46303-a782-4e67-84c8-c29e381029e9.json and https://artists.proofprofile.net/proofs/artist/06b46303-a782-4e67-84c8-c29e381029e9.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 0x584435c4a0669a6be6cbf7d3f56dbeaf587e81d5481330a0d2006aa209312b76. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES71987063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f2a15a3bb346f7983a878554bf96ff1e0ccf4fc6dec64518a1869c1d9d491d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:38Z), 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/QZES71987064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3eab522b5a574631e97a55b0bad43692b5777c144ae702285e41ccaff18602. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES71987067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536acb09d28aa8e41c67550eb1df62f2bff57be07ca1b958e819f15e3dac4e1f. 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/QZK6J2125096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67072b7ce08de7d61cc814a51f0edd2de6a38a2d2c2de525d1fd12614597cf05. 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/QZK6J2125097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44e6209e62f3dd546f310ce1db8813dfa3303a3180c020d1ad041826276c39. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6J2125098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaa3fabfdb986dc9dcbe9d1e98c989f25c6f7ec5b768527d109c010962b855b. 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/QZK6J2125099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2fd6509b41ef6791aac2fc6823e670b0d1f8565ca401766a54526bb73a5b97. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:12Z), 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/QZES82209045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c866584ea8390633a35e684594b8bc74e1c155f1ba60663916ce4ec0153bf9. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZHNC2204022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81bec3d02cf9bb4d7a55f090fd159c20ec3dd5ffb0c45f9cdd467f88d96ba2f. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZK6K2250911.