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 0xfec13aa8806bac51ac801547fc0027955e27deda71a9f8e623c4a338bc8a30f7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6a452df-0cf8-4ede-88cb-99a15908b004.json and https://artists.proofprofile.net/proofs/artist/f6a452df-0cf8-4ede-88cb-99a15908b004.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 0x5332f5f0bd3fd871c82ba41ff3c0e1f2fa41801f6d4785cd65bc34ad5b529cd6. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:17:33Z), 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/QZDPF1826897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8466f2270f5bc254d9b9a985efe970eac951e88af99a1ec0506b83efa95b3c5e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:00:52Z), 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/QZDPF1826895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d97234c41c6f7ca60e90e2863b4929256f11ead4b1cf6d51deca244181909a0. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:19:44Z), 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/QZDFP2161433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73eb0f27bc37bd4c20c13f6f14196ecee9233f178cc68923bb5150537b14130e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZDFP2161337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701ff221f87208b6d558e2fae328f94280bad7765c8148e1bf03bf1a3bd8f12a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDFP2161338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447b9f3f05302936b3ff62eebfe4929309a96d657143057b0cd6075135a84bdb. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:27:58Z), 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/QZDFP2161333.