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 0x2d486a1dd8a8034c95c01708cad0e051b1c1ea423a7da0e3fe9d279c3302e72a. 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/1cd1f06e-feca-4e7b-8758-131569d08ea4.json and https://artists.proofprofile.net/proofs/artist/1cd1f06e-feca-4e7b-8758-131569d08ea4.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 0x940b4b7b99da7d063b3c0a14918268c08bb50124c11dab5d79385b7815d16a42. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:30Z), 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/GBKQU1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3686b9fba3946c99d4f86a46777ec9d15d637c9ab52a8ea407f31b06ef8cfc5. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DELJ81741565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6957f36065c84ff2a43b7e18ad935692c3282a727215830757d582eb0a056d06. 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/QM2PV1755739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc10ca57bfe154e12fda6eb79b8d7ad5f7fecbaf4552adb6d0d6d7fca0629e7a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CA5KR1577828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9887ea5cd80475788fe132fa0f6069e3305af77c402d5338c08ee518d0c76e9f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU4501842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8f3ca39b7eb4c6ae515f6d9505288f69296eba376c56a78f08758a801371e4. 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/GBSMU4849409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae01cfa2a5858dac66f547adf8a2c4897951f7ee4ed3c8ed070cb49bc4999da. 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/GBSMU5048307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c07fb51ec05dd9d7ed8776449a630e185ff6300276f51fbeb3907a4b263f9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:27Z), 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/BE4HK1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e28dfc40ec69168e11e1a411660014d9478abd1f743d7e7e70bc5d45fa712e. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:18:06Z), 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/BE4HK1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37633df69b5ca4b9b4b6ce4c967bc22e38cb0c966da9b2e38113cddefe60a7fc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BE4HK1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761080cc359be0a594c8f764dc3f0de7c302afe927b9add0c33b4e786c2624f7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BE4HK1900013.
Change Your Mind (Sandëro & Carl Lazy Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6184ec2b6fe95fb377f0d207cd9d4399049dec397b039f8c8543b208ee3d9991. 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/BE4HK1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101433756ddab1751a87b71e8660b5c95be32576446be6d135aaf191f156be01. 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/BE4HK1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217b6ec34047598d8977ac2721f640554da487f54dce63d536f57e19981b954b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:03:44Z), 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/BEN582000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf768225e2c3af22ae2736a39c800ac6a473be80c1f48caa5487d942e36ac928. 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/NLT2H2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8367f9cae672486aa3ad2dec8bd6e9ff457900bfe1c32148d1fbe45f680e7. 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/BE4HK1900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc1311bacf31156fd42957e4298fd674f0e7f08cb8c3e6a8210948618c9bca6. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:41:23Z), 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/BE4HK1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb1fa0435339c3c50fba1b00a7ae5d969a8d8f63f0c1586a2394ddaea8a3fb9. 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/BE4HK1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3451fbd53c7a84630822b02d83415a746ed8d818463d6cfff5a26d98601e6e. 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/BE4HK1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169cca46f62948d45cb10ea217cdaa9fac605822a5739639e564fcbebf72e67e. 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/QMFME2102870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccbfdde345cb7e3ecf670c50b18efd324d05b4d188e05c34b18dbd0cc95eab5. 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/NLT2H2100823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9a9fbb4519ca260b802af93915bfb585cbf32568c0361a0e4c67c14416f4a0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BE4HK2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb114c44293c6550a65e9102c5031909a410135897b5e3156f018f3e1944aa36. 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/BE4HK2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cd2bd4e21b2f7bff880e36a18893eeffc848c237453a6c4bfe7b98bb6a6296. 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/QM6N22276225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8198bb94e2676550f4381803d2b4f90c6a39ae9fdd9f8c39a5ff84ea8b1bb32e. 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/NLT2H2200746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f541948c89a9419dd99146709092421f3bcba4460f1363d49bb82b417a07a. 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/BE4HK2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a390c19f630fd3dc7876a1918f214be50213d46b6f6085f203da3f5e1ddacd4. 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/NLT2H2201064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4522af8176659fbad97acd12017962d6294366d919f4335b04779ba09e7b1f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLT2H2300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39dab94c318b9267feea6c4f7825b7e47b5ae123141a7f01729924beb134eaf9. 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/NLT2H2300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54473c97dfb76697ff8c79b5334e54822f4aa6f5e0e3dd9a8e1ae7be87d101. 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/NLT2H2301116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2d03ed9fb871192373e1b76d20fa83ca0dc38a56676496829a1589bebc7fe0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLT2H2400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf742d23f6f6e75f8fdf79b5b37ea737e11ee7656c829ff55d1fa6fbec6e32063. 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/NLT2H2400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae3c2de5177b33c9825155f96cfe5998bae79d872be979b93cda645606acd2. 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/NLT2H2400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7871f8d9ace038823c9a03c74a6fcbdcf0fb7c5f0e1ebc330bff1ce883799231. 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/GX4R52446728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3395d4d7f30b92d63c53aa96f37dd5808e2a76502a3c66068525eb1b08fa5fce. 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/NLT2H2401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966fcefc729370bc0290601f08e265b3196cc0aabfe7432c8c1c3c4020562c4. 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/NLT2H2401729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cdc452caa82b61afa1a4969418df713dfc48f574378cc099cfe88ca2bcd926. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BE4HK2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b52340062afc4fa0c62874201a658c502415ada845a261c9e83fbbe42585e. 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/CA5KR2047133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bee25b2fd555e01d254609b35db8b067612f6c82967ecc71831f5ee0875589. 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/CA5KR1507087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cedea50877605f92183d7414001f3551d67db651c2b3e7dcaf805ef807ce8ba. 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/NLT2H2400747.