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 0x29ec549fbca33dca797aaa85b5e8f6203a1e21d9edcab664f0908392125cbef3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ffe43989-ef3e-4733-9f31-5eefd4394a52.json and https://artists.proofprofile.net/proofs/artist/ffe43989-ef3e-4733-9f31-5eefd4394a52.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 0x5bb4cb815eb3611e2c1e5e1c4e555d9edb52a5232aca578256dca770bf2eb9ee. 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/QZTBB2428509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2df39678bec26e3b0d300b5542662edeeebc52d3ece43f823f853519fe9fb4. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:01:27Z), 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/QZTBB2428510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905c8b4745b3fc9fccc0ddfaf52bc71cd236862854ec58f5b3bf29abd7f726fc. 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/QZTBB2428511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4843bbda448a1f5e4213bcc02babfb3343e3120075c8c0a8ea4e5e25553e0c98. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:08:48Z), 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/QZTBB2428512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ef0cbcab5770d96e6fe16df352768d6a66e67debf83b2f5d14e1b69512ec48. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZTBB2428513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14e3cd1384f038cd03cfc89358810750d51aaf2eebf5bb13a8bf12b546f718. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTBB2428514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cba38403f2cacc0923457b3b591df8ae0a8d2e8b3368b1bf2b389fa686faeb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTBB2428517.