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 0x060cf15a24b16cbcf924df68109afc256f1b8f5b00d1dc4658e9716d5aa8f115. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc10576d-9181-4c36-81d4-f44809f4199e.json and https://artists.proofprofile.net/proofs/artist/dc10576d-9181-4c36-81d4-f44809f4199e.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 0xedeaa7768ea1fb5955189f9bfa82c1843def8b456a7658b7667bc6d623f0c81c. 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/DEZC62419914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1932e409f6e53ebf63701b8adcb350a33b384bf98702313231b59937521a8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ATJN42500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedeaa7768ea1fb5955189f9bfa82c1843def8b456a7658b7667bc6d623f0c81c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:27:46Z), 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/DEZC62419914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c7344adb17d8e2ca35559ae3ecd8cb3bd4ab2850af16899d386c54dc6334c4. 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/DEZC62460593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bb5b2769bd6eff3b3e3e0791cdbd9bf6ad91c2274e9f1c006858a85cac66d7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:31Z), 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/ATJN42500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaee57a084a1130379c5bfd7f3cf4d0f2f1a9528d77445498e60b5a81c14be9. 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/ATJN42500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d75089f0469d1eaef6703f68c96fc8b52f92dff7ff53744d0c949ac220f0fb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:54:10Z), 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/ATJN42500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2db6a909c2f07fa2af18563f7c2a4049987cfa092403e638a9cdefeffd5faf2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:22:07Z), 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/ATJN42500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d1932e409f6e53ebf63701b8adcb350a33b384bf98702313231b59937521a8. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:46Z), 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/ATJN42500007.