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 0xa3c3d4bebe9cdbd8010c88a150a8ee393ae9a2f4a71c232460dc3980527a826f. 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/5593663e-10ac-4c0d-822a-0eaf621e1399.json and https://artists.proofprofile.net/proofs/artist/5593663e-10ac-4c0d-822a-0eaf621e1399.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 0xf4e4b6976c327e3f2c6621abfa63fd74d075f528b78e2573d546bd42a93bd942. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLCK42406360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa363e92c41032f16b96bc65e1969d5723d8e202ac96a8ae33611572adad5d6d8. 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/NLCK42412883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75162f714e265165b681203acc95a58caeda8e673dc28b606e39d1934b97f9. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLCK42412884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0da8da6f4ae0af0b9916e1dac93ddc70887761b78594a1fe9aee70fc023272. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLCK42412885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa6fd9d8e7a3cd96fdc066a994c54753bc8332ba3dfcc7ebe3a762d38d2f9be. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLCK42412886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36502a4ec40a35d18f10e88e5cec075ea693de60f23e1dc1a623adae609a294f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLCK42412887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a64a80b89170a699856a1c365bdd6a4e0de5f60b30e590905a47436bfa158a4. 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/NLCK42412888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099ff74e136e234212e5cdc3f9594ff9d17ef6bf50efcd6b707ddcd3deda6382. 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/NLCK42412889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211324cc8b8797fbd3d7f5bf997ad59db5404ce4ca916ff64bbd424bcd5be522. 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/NLCK42412890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a3c74486cce14b080433bad8c3b4e899cce18c4706bd8c2a7ac42945d094f. 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/NLCK42412891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fd5ea138c302065261760e1a86bce3f15f35cef33d75e02dff0cc7e6bda143. 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/NLCK42412892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46beb5813eff050436a60ab5f2bd29bf20a544dc6a14d82aacda80e98f447591. 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/NLCK42412863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70b37f64fa5034688726b7f0d1f83c99fdaccef3e96b52588aaccd25d896971. 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/NLCK42412864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a47857e3c8a6d3c915efe063e8b8c91a447b13c9ed3a4574bf740b635ae209. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLCK42412865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632a015cd4e7e9c2d07dda00e26c698510e37bf96c19bd7053553b0c23b9f779. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLCK42412866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc3627edff91d5c240d62360fc92435c998805cb628f52eb635f0500aeb9ff1. 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/NLCK42412867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f208ae92ee578254be63d3f57f9a5147406001e15227e7a7b19bd98652bd84d. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLCK42412868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4523db99b4cea400f8277a40f2344ef7cc2d1f84761cf50e867540286c93ab9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLCK42412869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859d97b2c72e928dcff4b1e41bf35bf66648c459d80bc9e17548820f0f07cdcf. 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/NLCK42412870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf56abb69c005a147bb977f4a7814e790a75cf33b05b31fa1124417547d6002. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLCK42412871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b69aa8d85b56a81bcffde95136760b953a7df77f669f83375d704ce884f5e. 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/NLCK42412872.