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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510679a7bb10e53143123a8ecf15e02a97637c3a0b19b6ce2a0951695d458526. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09b87144-9d1b-4f29-a67b-fcc603b9a168.json and https://artists.proofprofile.net/proofs/artist/09b87144-9d1b-4f29-a67b-fcc603b9a168.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe7316be36ba619758e265ea9293eaef6921af7211db3ae2160fd99654b754c. 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/USUYG1140162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efdb4497d45b6097e1b7eb04dbe1765a60d26705566bce2f9c097a82c1c8f55. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUYG1140163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71cd4f707aa479738f4333508e5ffa7ac243691bf0ed25410e92fcccb9e6b2e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USUYG1140165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aeb1ea75a326ba68f4cc0e63d37811c3001a29c3cdc76184de14e7aa273d67. 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/USA2P1523762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad5728a6cbbd7a5690b0393590af684e39e962bccd6555d60102650864f118b. 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/USA2P1523763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea128eefb699f4af2df1b83db67b0388c727a13354fda0fca19bea66170dbb64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P1523766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee45e35a219aa82d6efeace4f65af1c41c9a18c6e680fddd8cf0d73ffb47cd0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USA2P1523767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb496f1d30bc275123af746f8a136a452efc87379380472af12d8002fdee0b211. 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/USA2P1523768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc03c2e0cc79a2284f1ca5ae2820099c7c92b2f464b28a13724b5a880f2c491. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51562294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0a6cf93811afe8a9c77fb53d9a37918d40f251b9228cf27bebb55a95ac426. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S2304964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333d9356bdb7bf7a0ff69c71cc7fc3f8b4ccdd44c3759297296a9e776cfc1bf3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS652348354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bca40c6175d743b96afc0e3e7639188238b3cf0dfd1b626987dc8c6d0232f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM24S2303263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31dc27a5038bb5a6c63d20ae26dde59adf135fc6f0cbc76e77001d2ab77349b. 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/QM24S1804877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f180c6e0e41163a2006655b1e8129d8f6cb9d6dc0c1fd7e9f33e6cadf3b44. 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/USA2P1689686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a73c1c8002a9084f2cd0f23f396ef32bf343d151fe8da66bc37f198897b616. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S1650121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31908548295093871c1695d97f1ef6fc2db75e9784dbe8523c2fe242b8ba8e88. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1571032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c8259b973fe7c717d0f1435b3d6e5c99c4379abc598bd8d733d9a25a8ea17. 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/QM24S1703646.