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 0xb3a0c0f924fe2d7f2067df4c5122638320a427f7ba118726635d60379416fe4f. 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/70ca7390-a629-4409-8e5d-94121d0a0418.json and https://artists.proofprofile.net/proofs/artist/70ca7390-a629-4409-8e5d-94121d0a0418.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 0x1575195c2a15c5c9e25df4aa50abf327475929795d73295d2e4b0f5641351802. 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/CLA1D2300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7fc389aa9c28d383ea9fbba3a6ec840e94767248dd922357ba32925c8069a. 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/QM6P42175537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5022f3e3d527fbcb40db0be0c2069eda595d90727ba86fedfc0c2ebe980a7ae. 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/CLKT22103711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5ed494d65f759af9b313d172042c63ae331e8cd2091f5fcc432620357aa9fa. 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/CLKT22103710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ffd9bf0ac729c05ee0db13c25b732789c9d2a892490ca7f23b4ac7a5e8c5dc. 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/CLKT22103709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896e7aa63471a66ccf40233ee63043d72baafc0a9883b8ea33d434e73664d2ec. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CLKT22103708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de71637167d9b6cdd7f50e1225d2d0b031aa4e3d1a7534ef0b377f47dae9b3d. 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/CLKT22103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2a521bd611090f4c6d8e96145dad0a8b8b7a1704afa38afa7e871799c9e576. 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/CLKT22103706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1344f13debcd5b5c3d2000da2f5eb9a95ccb73dcd2866f7e1158143ced687c. 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/CLKT22103705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240db04c40431621a905ce660168af5c15182c67753c67a317c35da7dbdc3aef. 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/CLKT22103704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded42de8cf2383ea6b28331356c4bf6cb11c4a7cf8351b751eff87647defcd13. 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/QMGR32067888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf332dfb9bb0e24a6cb0fb47f948e3afa49b7e3c420bba7f5b78db1da61b15. 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/CLA1D2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccc9fcaeb8005839bd2dadfe672d255095af10cbb993154bb9b81c95cc71c65. 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/CLA1D2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246fcba22018af8e65c92137086e0d312adfff84672e7036573bfc40a6edd64. 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/USA2P2457901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36c5c957fac4f7f4c1616e0021a1cc2cca7d4584b568e74d2a2462a388ad40. 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/CLA1D2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8a4936415fd47d80c9b3bfdd0c3c78dcda3eb721f709c7a9bbb7f137fe06b8. 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/CLA1D2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab01495f1787e5ba60bb777d822c9ca8ac449ea7cdf6f3be0645e216d1d3a3c8. 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/CLA1D2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dd4393c93f30f85656fa0ae269970feb001a1506560489c4c2b4276f842346. 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/CLA1D2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2d21365eea95cb2ea6859bdf3b23c19dd738edb55796ed14109aedde1248a1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CLA1D2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d7fc389aa9c28d383ea9fbba3a6ec840e94767248dd922357ba32925c8069a. 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/QM6P42175537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8938b2565a93e6f5cc81ca1834386fee2b76abc78ed604d4c6b6a971d021b58d. 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/QZNWU2156923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956d648b49e750f29ef38cb534893efe5eb82fad17f7fb7df736a28057b5cca2. 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/USUM72318219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964116b2b24af484071dffe5e8ef6c90d1dbac45207434a7ba81240604e469c6. 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/MXUM72400426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbc117c6c46ad7038896c58ba6cacf632bfa9c8b221df10e65161f323057683. 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/USUG12305254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf341af36a2a50dc157f75aa8ad541b127b3a1bae7a1b5e782b4ed3a816e70d2d. 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/AEA0D2320873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd40f29283faa15b76019cca3e91ccd644ce35668a23034d26d7121164023bc. 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/MXUM62400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ff4af4490e6ced781e2666d78a565e62097ed11def32cfc4b0c3f140d6b702. 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/QMDA62454853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112cd1696dbd2a22a42a77e4f3782b1a38962ec7ef0c006d0752c87d743da11d. 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/CLA1D2400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04d453130c47623ec0cc850c76b0edd725bd49c118a8f197d6ed1e01712e730. 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/CLA1D2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c6ad7b26ecb866a37b3e258b6fd8378b2a06fb08761a45892a5b29c392b3d. 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/USUG12305259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ef4bfa3965f23723b97fa4fda34ba98e5e0b970081b1f7367dba6f9f953210. 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/CLA1D2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d12e47986914fe0fe10d5b827edceffc364e4543b1815b0848f57ef75102c7. 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/CLA1D2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccc9fcaeb8005839bd2dadfe672d255095af10cbb993154bb9b81c95cc71c65. 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/CLA1D2200008.