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 0x435ab9215179ed7c2b61fe61da71d5b20da53af9d492c6e63fadbceb32ceee7d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1b5b8f3-93a9-41b1-acc4-1f459714d2e3.json and https://artists.proofprofile.net/proofs/artist/b1b5b8f3-93a9-41b1-acc4-1f459714d2e3.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 0xcc81fd88c6706a02444e52d7b2f7f259ee6a5104d503afab2d48d700a6ce2d81. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:00:41Z), 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/DGA052015610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d7708d75ef36fb7c65654d5dabb183d2b9de8be1b441ae338f6af860452a1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6J2032166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6838631f279182b2cb4c56598a84ebcbc43975f360c783f92579b98138fb088. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:28Z), 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/FRX872183894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f4205e3336c99a3b2ab63f5566a806215f300a1e6a443b8d81df2aa829b5e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:38:44Z), 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/QZMEQ2427470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a52d54950d853950c596ecb90936cf9e6f8bb4eff0a7bbac43487f4529612b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:24Z), 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/QT3EX2573146.