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 0xa752181d8243d76a50b001e157c9403a5f4998f106f6aea647cbadfbda61a6cd. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51c50462-e6ea-4a45-8255-ca1146617e09.json and https://artists.proofprofile.net/proofs/artist/51c50462-e6ea-4a45-8255-ca1146617e09.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 0x7e83dc2edc584b5afb61700756ece1418778cfd728c825f0a7757fbd26346918. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CACWV2105589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e755f0250ea7f31a9d98b3b011b3e787db75073b6f66b39b3d576a69c93e33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGA2213631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e8bbe65b8ab79016e0f79e4ded5a39581946e42eecd3c64aa9bce0c0a22d4. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/QZK6G2109142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9834d0d876596b47294f2147155f641bda2b42e566d6d7560add53c54d8708. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB62398841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b52ba22e4072cb4f49c3ef7d53a0efe66e13cce63bfbe7b73af4a0a45f908. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHN52234690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775eb9657580004ffbfc2dc9c4b63879b9fc6168b90569f5b7fefb09b119f9b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZFZ32268959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6371beca4b1739b98702ae20acc62e73c58cc94db133f5860f38f8b4e4facf41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAS2184366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdf4dde235a7ed997a9bf64819f5513bc16ca892f1d83d4ae9b69b269f932a3. 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/QZPLS2110714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b50edcf4e3f4eda4affa3295b7b7ddca7d77d6069f5e38ceb618ec6273f62b. 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/USA2P2105672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12511a00bd17705612bb364d1bc2d65d06526659775350be29b6b01f09c89bba. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USA2P2033596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f5c4ddd8547e23bc7b6e6476ba35ad658a43fcc4c36375f10fc1f108160f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1972010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fcd512e1ee9acf1e8032dc9149926dff6b2f29841c4bc39d5836856b5e090c. 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/USA2P2014590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b396486bbf097df405f4ed0943763244d0247114969d17fc6494cc040a181a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMA21890036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5bb1722509e95f9046b6677f6fc1a03a04ba1b7a93ae61a185962b62adc9ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP1769800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdb56c47fdfc32c2b33284e50f9975d80b40f331296bbeb61a2e521ab0f6b31. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBMA21890615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5bb1722509e95f9046b6677f6fc1a03a04ba1b7a93ae61a185962b62adc9ae. 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/GBLFP1769800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9306a7694aaf10242f89e465339b7b374284bd8227e5749365faa9b65ad6efa8. 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/GBMA21842233.