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 0xed897bb1576549ec44a9e8de0b1629db1da5ecae10c6f4dd1f8fefa0f1a2f90a. 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/6a8ac6cc-4270-49da-98e1-378dfadc3284.json and https://artists.proofprofile.net/proofs/artist/6a8ac6cc-4270-49da-98e1-378dfadc3284.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 0x1173555e83e3c765d195d4507143153c97d2c5f427701663da26c2e3ef782be1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:37Z), 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/TCABR1393183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c30ea1081415e23d7701ff96719141eb509f36eb31b6c63c4ab491eccafb2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US39K1071201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2765d2950580363a4a978a9a53401c2ee23726452a8517ebf4ce759485d622. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/US39K1071204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536fbcf5db2db8402601c3d65598832e373afcb53afad36f67289fba00c0988d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/US39K1071207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaba81edd34f651eff23ba21cf9e44680fd2950274abd871866826e3ebf08bf1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US39K1087206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02bde4524c78f0386b82a55d7a0033ec21a7d725c6da7bc947948dc7955d1b45. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:39:26Z), 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/US39K1080207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2b96a5896e39502728619037c7622afeda1d6fcdd12461696981fc5018de98. 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/US39K1701701.