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 0xb77b25dcb310feb4162fb4722ce61f8ca2b58e4ca03c71e0aec3c0a7b72b5ff5. 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/704a081c-7600-4972-87c5-70b9828c69a0.json and https://artists.proofprofile.net/proofs/artist/704a081c-7600-4972-87c5-70b9828c69a0.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 0x1aec6853c895d305254e5a84e58a772cc0a45d8a9df1b0d4a95335958fd53576. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FIBAR1300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386cdf10c2614799f76531a8bd5aa3093705395bba11a8d1826a32b33aea3ea9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/FIBAR1300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e2c2530715b1754f59ba0e7c4a604396c8b59d64ec6daf766cb7689a891ca. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FIBAR1300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce02113cee59d2b0d1a47e14525df5e40a011ce31491d28c5b02a0897770e6eb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FIBAR1500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8f273ccf743d18c3f49fe93e76e4a95a83c514873babaffa25ed7d62e161b2. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/FIBAR1500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d076b9e9f44a48b36681956eb2e9ae7a057ce701a42b46caa00e94bd527357. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/FIBAR1500184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee22542c29981c967a90fad1269fd6f2fca91d93a8d600aec2c292d0111d38. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FIBAR1500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b505f1eac458b4c1971e0f32818b75290fb5339eea2760a43df5c0d2fa7e9b. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FIBAR1500186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad1cda4c19fbbbe85596f8f2e4c9d79bb24d7133ad0035cfe4d40cee1a9f85. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FIBAR1500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d030bfaccb1751516a562efc49e19fb5a1cab2d1ac93871b6661c8dfdce5c8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FIBAR1600463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3abc9c8761e7200650701e96d1c55b67f1cc2f4bf44100fe1d3fa56b94e0e8c. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/FIGRF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f63502a69239ff444723d38af66a01e2e94ecaf0101f9405c5e8df2b473538. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FIGRF2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f14da0239ab4836c5e860db399d0473b650319e10027ad50fb3caf7af5c7237. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FIGRF2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eea452228626f998a1405de093e7ba9dc002057929760556302e1f7502a33fa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FIGRF2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa800138a11ddee2c70fba1c20264f5e924608d4a7ec6e553498c86c0325b8bd6. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/FIGRF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a46370d4859a86f2c862b2b42ebe4cead4db7e728759fa0be60447c7f20536. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FIFMF1221251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d12beb330930d25a333dba983da6d5672e3d17cf9efb9c7b980f0af896e03c. 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/FISOJ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf355f1bb8c5ea557d1b711abacbd7b8daf90efd470609f29310f06a2841426de. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FIWMA0300534.