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 0x25b68e0dcb0cee9016a5e33dc0017a536737b406cd89c4501dda409f823f3529. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72221fe8-bd82-4315-9f7c-f964bba516e0.json and https://artists.proofprofile.net/proofs/artist/72221fe8-bd82-4315-9f7c-f964bba516e0.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 0x2eb94b920f44b29446ff94f9bb25364b185ecf877910ef6ed0ca3d935265865b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SE5Q51810710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fba064c6ed9c673abf22d5c07592e45bd56e25ad0c1b023a524b6249fcc5413. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE5Q51816244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe191e76bcf63373054da7cfbd96b97d802288289b24002a4f1054eb0c3b23c89. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5Q51805033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989b69e5667b7d658c9fbd309ec162e59b41626660dea6eed6acda1b7221e354. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SE5Q51821137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c0b9668c88f1e7a01cb2e82edaebbaef09a862fae84062c8a80592f6168112. 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/SE5Q51828000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27da1098d09b02351d0b5a03a6eeed586d70e5edc5efa72ebaba4b2c4c2dbc3e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:37:53Z), 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/SE5Q51802692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe61e4bd0264d3db68edccf6f911b1e58dcc426cecf9b9dd1fc02f6bc840be. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:41:26Z), 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/SE5Q51820840.