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 0xd125d1af46b95a3ab0f93f6607f54abc19c2758841c4bb0e5f9d8cf0964faf17. 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/e445c11a-7cb4-4deb-8733-67ff595205ad.json and https://artists.proofprofile.net/proofs/artist/e445c11a-7cb4-4deb-8733-67ff595205ad.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 0xa32ba6bb7325bba43f56006a4ca4dfeeb9171e5bab112d41d0679c2b1ad51b3c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:42Z), 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/QZN882074819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958f3b092bec00193c093b4cf20c3214037b0292628b5b1423db8a36c95a2c3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZN882074821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a7d894568b97137af3b9c0a1fe3ac3350c177a88973395e921676cf79bc18. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZN882074823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d404142a6bbcd172d9e40dd6a4e9c138f38ba36531210c98c0b5b15a51ecc3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:45:16Z), 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/QZN882074832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d86622ff7ac982506cc9e56aec4a8e4e6eb7636a9c38354a9553f00118bacdc. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZN882074835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d7a5427d507a5b0bd6ca8c693cbc77080d2c4f9e46b7d825b8fd5b9fa81867. 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/QZN882075785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56316162aef73bfa7956b64a568e1210c16ff5f9d46337269999fbe702dac832. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GXH2J2597108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a982c4302717abcd17882b069d75070fc03af8a90a59852d0e2ae3daeb06bd5. 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/GXHAF2517947.