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 0x537da77276ff2ba5813319d38b39d9e798050188d4c77e6e6f22e38d2468fa34. 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/e9ee538a-ca48-4b70-a402-403270284562.json and https://artists.proofprofile.net/proofs/artist/e9ee538a-ca48-4b70-a402-403270284562.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 0xe74bfe36a9815b15bd9802d5b33d52537949449267a50957dd4b6ca043512f92. 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/NZFN02300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7fbfcaa2edebf6d11b4fbe23140fe261080ca0b78589fce655fea984d2910. 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/NZFN02300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300906667dff9d6468d5ac480e81f1eac199cfb32e217a037cd5b49445057acb. 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/NZFN02300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe217097428068298e31f9192a0fc2629056891a206243c79bfbf36579ecf124f. 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/QZDA42341565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e5a167cf16800885f84c381396056bf891b8944bd9992f6c3634fcbf66df8c. 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/QZTB62234097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31288a2f6ddaf560c00fc0d5d3f39966465f9006c78fb12bb5cff5972652a2d1. 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/QZTB62234096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd04264530ee64ba32a882191bc633fdd2b5024af739f703598ec6a354c0a74. 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/NZFN02300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9aeed0625eb1786bff16ed9dd056d145ef0d1ad392d859c6b4baeb0c439139. 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/NZFN02300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90cae3834b06e1b715a939585e620fabeec6f8bca832de165f1a152b2d0ecc2. 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/NZFN02300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc397b7fff63c3b7dec56eed2a632f84619aaed4e1c9a94d5e1300372970e3d22. 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/NZFN02300107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa465c5dcd557b7dd4cfde017904c0a310bf2bd11f3c9a69e5557836119d3d. 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/NZFN02300108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa458bc7f93b2c117dc3d30e59969fd6b2110de6773c79b8c8e364aeb94f378. 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/US27Q2459101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d15c5d7d48f269678c85a1667815119b849c7fe231d78c45be3c30e34e158a3. 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/US27Q2459102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226749b52f5bfdb50f1c4c69de17b4ee0dbb3a82ae3bba5a68b55244e55ffc0b. 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/US27Q2459103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f0cecade49505aed87a5ec3b4ca998894c0d4ef73f8d29de8fe46337f45c8. 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/US27Q2459104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0925a58fb51bc984d4e9b00d8a677defdcc3414fe57d21b9afc8d86d18592c3f. 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/US27Q2459105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621c169e1912f4dcd0c04bcf5fd5def0c8955bc306a21953a3a3914e6796ca64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US27Q2459106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdae12d2601c9db0def175fca71102c08dba819cd55adb71448e7d983404cfe. 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/US27Q2459107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869f0cecade49505aed87a5ec3b4ca998894c0d4ef73f8d29de8fe46337f45c8. 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/US27Q2459104.