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 0x11816c81677d6ca74ea63d99c40b44b84e972330f3a58e9d922eb4a6aaf2d548. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/580e802c-8154-4ca7-943d-b137e903bd83.json and https://artists.proofprofile.net/proofs/artist/580e802c-8154-4ca7-943d-b137e903bd83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
4la Verde (feat. Cedry2k, Grasu Xxl & Doc)
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 0xc9e8ac71ebcb7b4f08bce64ecc941dcb6b66adb3a8d53b5f4025a71a33a6875b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:53:53Z), 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/QZES91886923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1769ff5fd4da4081ec15e02d734ac614fa8fdb03caf2b6c85b8bc9faf1dc56. 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/QZES91886925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a68cc67b30445b79e0ac24ae159ffd5e467f1ee909fa17469ee734c433a1087. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:21:31Z), 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/QZES91886937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2815c95d174ffbee2328a6d5772f2c23fbd92d67af48abcbd86227519cd253d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ4JJ1968355.