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 0xc9ebc89885b1ac2a4ca4f1b5cd3bd28aa71fd74ab6335dcc9f0c947124557039. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7737dccd-7092-4a96-9a9c-e48da96e4d99.json and https://artists.proofprofile.net/proofs/artist/7737dccd-7092-4a96-9a9c-e48da96e4d99.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 0x35a4f02da2baa1e3d85fa060b1c14d7461c62e1986e91b811e77ca00293a65bf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMHK2514987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6505a3a237e89ef9a36f078100dd4007ef9efa7e2a719f5e2e5461e2b31dc0. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:12:00Z), 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/QZMHL2587437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48f290b7977c1335d343d758808aad1bba81f97e234cabeed0bc4d47048367. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZMHP2551473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d662ba364494f6cb4f6c654b5cf05caffdb151d22d6789c1402c4bff9b50bb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:46Z), 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/QM42K2519908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d18ea9c96b08da05262c7679c20723f57373dda53cb9e309d301717bee131b6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:04Z), 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/QZMHP2583640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eeed0a3edd6234e21f47cd008b03f0b76a1d641292aa0a2430c9d38349662f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:08:46Z), 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/QZMHL2585514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6664582ad725d403d6574bf9292bd671a3eb4ba5e1bfbb3130f87c16368b86. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:59:41Z), 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/QZS642538442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ae84a35dc10b993735b6e72f096e5335ad10f4a14a01dfca873dc8d218045. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZMHK2565166.