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 0x75401bf1f187477fc47b29eb953b35ad1b3c2b6f5ccddb76af8ec9c486e84968. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e33ac1c-a174-4779-a64a-f13939c93d49.json and https://artists.proofprofile.net/proofs/artist/6e33ac1c-a174-4779-a64a-f13939c93d49.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 0x14be17cfbe674c28ddd076df5a00e745494897539af2df556ba566c935159d41. 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/QZP7F2525630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cde250637dc7fb0ec84f961e4d645d8ee94fec97c0e43f23d15d0b270a817ac. 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/QZP7F2525633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637e74d126b346a9bc90a10c8a310737f60eaee98ad95272dda644d10c31a477. 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/QZP7F2525641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bb047fe255f99f8bc67edaeb900ac0210fede459a452841315dd92f17bc404. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:25Z), 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/QZP7F2525642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4787004f225e1a64696f4326e0710c3f9d252122acb66793f46ca51c10f0075d. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:44:01Z), 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/QZP7F2525643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385a05dba1bed2e84c493305dca15169c56bf841bfd3307fd61ff0b4287953a. 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/QZP7F2525646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeeaaa833ab4ae10bc8f2a711a97606065caa12cc4b2dc4fedee922c62e6bc6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZP7F2525649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c174205b02983bd8e8fd3993060fcf7982a8ce900eef4e216f4e767f5c84f97. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZP7F2525650.