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 0xfb5711cf130d57f5e7852b6ed6fdf203c03cdebbc3c0ad75c83e1fd3eec2f08f. 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/a209e483-8f11-467d-8c46-dd53a106c878.json and https://artists.proofprofile.net/proofs/artist/a209e483-8f11-467d-8c46-dd53a106c878.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 0xa26968ec8eed7bb01a24b63c8565e41f633d500ebb9a31395e2bcd02100efdc8. 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/USM1C2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a726dd67e6d622354b82848c2672d91b5b7680f383aeacd8ee7a1cff719449. 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/USM1C2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102d53f1c608dd70dc58212c826151f9db48971e05ed46f24e0625a5f4cf3f8. 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/USM1C2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28506070a4f1edd6afb75d1501d59b84e366d129baa07222014778e5f9966880. 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/USM1C2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d02f4873c6aa2234dbabf6737e699d63264d88c81d59842767496859aae86ab. 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/USM1C2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ade6479375b3e4bf9538d082bce91ac2f91085a40af53b5e236d626682d20b7. 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/USM1C2300609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ea01e6865824da374f49b8dd648028830022d57a79e78c8251d0fac0420bf. 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/USM1C2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43046e5daa32be907dea99c4a310194521402570c5b139a86cd3783b6834ef56. 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/USM1C1800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e67d39ded6b07ccbdeb5f499787944a21e9b2680125cd3fe843576e6873a91f. 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/USM1C1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe03a9a3185ab724b0447506c91eb85b6c20a9cd776afd3854f2644a3e880ea. 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/USM1C1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa481e4513e2bae394de9c222143bbb44b48f9782bf197f94530e9d4ddeb7c938. 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/USM1C1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebc63d560358da8eed04b7f7246582ea19aa9590f850bfa1903401eb192328b. 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/QZXWQ2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54047956dabb74e06dc9a5222f6a4133ca255a2b4620a34e4d975c24ca424d3a. 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/USM1C2400000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b90055629536f7e75432042046c6e7d8234b4f7f4c5cb0f86e904d089cf0c. 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/USM1C2300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a726dd67e6d622354b82848c2672d91b5b7680f383aeacd8ee7a1cff719449. 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/USM1C2200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd8af74c65309c583ade1b090542f794c36cf6983105848e3ab05a27b01843b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USM1C2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05adbf156d139567b2f58006bde46eed0b7aa5bed75266d91429c35eee77597b. 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/USM1C2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102d53f1c608dd70dc58212c826151f9db48971e05ed46f24e0625a5f4cf3f8. 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/USM1C2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe03a9a3185ab724b0447506c91eb85b6c20a9cd776afd3854f2644a3e880ea. 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/USM1C1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e67d39ded6b07ccbdeb5f499787944a21e9b2680125cd3fe843576e6873a91f. 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/USM1C1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43046e5daa32be907dea99c4a310194521402570c5b139a86cd3783b6834ef56. 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/USM1C1800210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf11b8dc4ff1e05698c9adec5fb73ea92205a8d574e84687d4ffbb38cbbe97c7. 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/QMGAC2100061.