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 0x8ca3be71bc2222bc53dbc8bd935f994644ef8f54d58c5ca4e144000a044b7bca. 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/403973ce-0607-4c0d-9efd-0e7433292818.json and https://artists.proofprofile.net/proofs/artist/403973ce-0607-4c0d-9efd-0e7433292818.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xfcce25dc0521d3871d380b5c1a447c3a36933c25a040e027746e7031d1e5faa3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPJ1999525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b13b3e518d22a92e61d15de9dccf56ebfaa5cc53f50620cf7c0113c19581841. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCJPJ1999557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa37281f343a7cc21dd0c4c26b046fe965261223612fc17ae9ab7d4eebb7794. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCJPJ1999795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f81e0d37d8f2ff35f5ba93bb36d1348f0037c4bc1fbcacd220895962fd462d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:08Z), 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/TCJPJ1999735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d15a1793efec6258fc7e61aa6dee60a49dd09ea6b5a9360023a31d902c0ff. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/TCJPJ1999737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21028b392cfa6047608dc0eb4f9114422c9c6421c4998072891fc288eddde49. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:15Z), 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/TCJPJ1999741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645ba4aa3dbd15866a21c8803f30d6d2a88599897a879a53eaa7c4f8d655563f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPV252000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa423f4a77d891316d2d59ce0f597d0c0777a388511fcf2ec7a77f08f842ebb44. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPV252000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb211eefe41b44c559503f31affb2f3e0714e117bc0b04081c95923728a9a4baa. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/JPV252000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e7a9078717c37edd98bec0c6165c840321c9f5f589f4809bdf6b96db8a3902. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:30Z), 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/JPV252000424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80862c21e888f04878351a9060762a02cd8f0b7ddcbd4b9cf1262c52374ddd60. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPV252400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6d0207a1974617ddd1063d01b44c2451dd2af6abff8c6f38e0de0b14a348c0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPV252400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0501f27bd742f41e8317808e6541274e544e17a0bf4ebddc3f1cb5a0b089c5e8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:59Z), 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/JPV252400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc864078643ef4f725e1f1f213d9096734b1e5960c3a1ad076c5a52334da37f22. 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/QZMHK2432570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2f079ae6708b895ab08634963d369303f5f3be0c865afc20e126405b27572f. 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/QZMHK2474278.