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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc1d942113879bb7aecf2053f5b901e244f1481c23392ef5ef87e7190f09f67. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d41166e0-6c9e-479f-97af-adc64302bcf8.json and https://artists.proofprofile.net/proofs/artist/d41166e0-6c9e-479f-97af-adc64302bcf8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87437e2c9f13d914a1c70c7aa0d904b5f08837fcd06a2ba99dbef6ee23473a8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1951280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26746067e8434b86f87992a44250c9ec9d86ab159ac30c6ee9ba1cd0ab47ae0a. 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/QZHNB2502696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5512caf556662c3222b0e6180f3e7ad7507169f62873068ab040793395f45f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZHNB2502697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a1e04e57cf255fd6279ae6d6423c9877da9660a11370e62bcd36c1387064d6. 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/QZNWY2578886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291e10f37938037808b3fc1110241496e668a18acd61a62daaec31995be69a40. 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/QZK6F2540591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84aefc4a01f7ba521debbd8d12272f25733562a6882f6953e05e3083ecc15b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2540592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca1292d05f34edabb3e7c8e6a3fe6646909676ef84d72bfe464b9a2b650a6c. 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/QZK6H2564704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025eaddb3be9676df2333b2e228654fe4d9822d2217e783b8f52ed491cbaae2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZK6H2564705.
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 0x298652342659e2b955419ae474709962cc08548b4c0dcbf3bdb59dfec2e84deb. 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/QZK6K2553398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c359dc3b5973cff512eb17d6513b407dec2bbb61f6cadb4745aabd186234f90. 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/QZK6Q2578078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ddfcb27122a6d46f8050eb2d3a8d8277006a76f7bed1427535aec36e83a7372. 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/QZFZ62502367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3369be57ee8f6fd0ed6a07753d973194aa00d419e61a331a62314e981983ed77. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZFZ62502368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f63e03aeb2033cd0aaef58440266206204f7c24fb89b98a12f60e66ef6af72. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:20:10Z), 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/QZFZ62502369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd9822c522479fa562549b4951b83e1f2d093a5f95086c585d344be78519553. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0S2400646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f7b705cee4ccac8535880c5364ee7bea013ac0f48d731480da6326975492a7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTB92460638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe133accc5037e3c429d92e039d8c4613666a9396a6f8f2eebe3ded18cc384cd4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2444308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa94085bc6bcd13b3355d31125682cc12f371f4ccb984e33f893d8e4aebb394. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6G2456263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84b2bb28e04f3d621c3230f9c9666dba815163e96c1073aaad7d447acb0bec6. 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/QZK6F2444309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db533ee269e2533b1df476d50c6c8c91daca9d49aa78d0ab781dd9259c3ece. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6G2434681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442dfbac57d49b03858937b123fbbecdaa50079ec0dfffbe505392c6915b255e. 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/QZTBF2371759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499a504e8efb410eadf5e276a0921dd000c7fe0f6d6b787242da81abdce94dcd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFR2358930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77dd0284f77bd57f5f6424b45125099d1a82374477e5f6329355f4f2346297e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZWFR2358934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcada664f9704c8d4d9f4be4ee64183f61d6129e22804bb9565509924aaedc787. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/QZWFR2358931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff594e216e465d98366890418f25c2d004a23a57fcd5fbe6b6a7d123fe52b7e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTAT2384704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2010545a74d3659db1969255ba6d1fff7800bd5d588156a9e14941b17b0983f0. 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/QZES72329129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8206251df840edf908df629c3ad0009a0e0bf29c168a1c731e8ba9dcf647d7f0. 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/QZMHN2063471.