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 0x8354f87101380a485071193487447635fc25a3013bdeb1d736086d722022e4c0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a61d71b9-ef75-4c51-bc58-88a43a1dc230.json and https://artists.proofprofile.net/proofs/artist/a61d71b9-ef75-4c51-bc58-88a43a1dc230.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Thousand Eyes of the Night (with Rain Sounds)
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 0xf62a89141639905efc7d2ab2c4328e9e0aa260a2cf131b8242a8c1abc8d4b6f6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:31Z), 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/SE69Z2415299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4c3bb9d923e1e1e5f71dd8c4fa68dd4111c7a453098088bb78bf1d8ac0d99f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:18:37Z), 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/SE69Z2507831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2212339089258bba158aeb804a2dd1d25a5ec85d7d26c00f0a5dc516121270cc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE69Z2406738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a89141639905efc7d2ab2c4328e9e0aa260a2cf131b8242a8c1abc8d4b6f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE69Z2415299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c82363be912f882fd2177065f2a3f6443e443788fc290345cc4c400f2d12da. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE69Z2403158.