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 0x644d4ead1f143f73a5469cfb791e288f817fd3294247b6f1cbc67155a0c21f22. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd4df684-eeb4-4947-a5c0-f74737eeecaa.json and https://artists.proofprofile.net/proofs/artist/dd4df684-eeb4-4947-a5c0-f74737eeecaa.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 0xda73c3b094d2f2badc037378e22871aede768ad136d0d3a467c3c02c31c3473e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:40Z), 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/UKCPD1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36930ed5786dc49c51110902bb53e6cae319768f041fbe48440d47521cea2c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:02:11Z), 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/UKCPD1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ba7afbc4c5b3a7e96d5211ed80114426f0eab1cd764f63578fbc8f4e38131. 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/UKCPD1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fc0fdf63c79c98986577fed3004786a9b10f4ba07b1339f3efff317d222fdb. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/UKCPD1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2850c752517349e5c0107fae01810230d31709689ad86488ea021521b77af88. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USL4R2115258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c692a57d6fbc89041f1dc2d4f180c2fcffceadbaa162e12fb8a06bd7aae50e. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/NLRD52403696.