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 0xf3bbd3e6238112971661a0b803083ac21f896d601ae771528e96f045415c40c9. 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/64c582bd-62c7-4829-8b4e-2f1865a20b69.json and https://artists.proofprofile.net/proofs/artist/64c582bd-62c7-4829-8b4e-2f1865a20b69.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 0x0dc8a2d204824603e12db049cf4700faab4eb095f96163072726cc3c40482d71. 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/QZJ842000408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d00c2cf1746f2f7f966bf94ee6a562d6d65e00bf40421540a0255c01a3cf25. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZJ842000901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63783ab0a37120b3c14d4d39749d5b09d3dc31ff94f98b70aec535ef82f6b234. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZJ842001029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa9a3ca9025d6737708305c936fcf76c2b623aa31474d3ebca5c411e854303. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QM24S2500675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fc3ab0480f84f2913b4a04c78273bee0098808b1281507b44ed7638e38237. 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/QM24S2500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91aa9a3ca9025d6737708305c936fcf76c2b623aa31474d3ebca5c411e854303. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM24S2500675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fc3ab0480f84f2913b4a04c78273bee0098808b1281507b44ed7638e38237. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QM24S2500711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f5c41f9153e3a6a92003efba9e1b39b611d3e9f1ba0e524de5b6119d11a1d7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM24S2501275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb681938e4526acda5d5fb48fb9e3c8565bff531f8cb7369a49ec08ad8bc2eaf0. 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/QM24S2501274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa051c995493c75e013052888f68f3d092547a8b9e8a830c34962a7827817a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM24S2501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a8ed59432dc83e603fc42db34f3de15d0e5ac881720a53f864b28944111d30. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM24S2501272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c08c9a7a6e549aa9e89bad97c0834dd922b68304b435eccebf8cc046e08d320. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QM24S2501271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ada6337b184766c336f483e73aebc37cfe7fcbf5192e1b1febaa1ecf47bfee. 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/QM24S2501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed2e905856f0d96e849a844e451cdb27e7bcd1f325227bcd9dc318289809ffb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S2501269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd271ea39dbd9cef703180e1550a6b90ddc48715b9680d863bd74cff177d85. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM24S2500837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d9cb5bb9270bb65ea00cdab0f09ad74a8b60c8643a83c93413660866cb1e3. 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/QM24S2500858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb02c0172d3acb650fe3f41d33a752b600663c296cf0a147f07753a3e59121f4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QM24S2501612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bd271ea39dbd9cef703180e1550a6b90ddc48715b9680d863bd74cff177d85. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QM24S2500837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6609d9d0ab6b0f728502e2dfeab3991d812de62c6c283fc809bbb1bd1f5d9ea6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QM24S2501610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec5adcf5e28a7b0fb0ecec0cc13ca7aacdfa254627adb15a9c177f37da82c97. 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/QM24S2501609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d670983721e95d50de3a3f8bdbc5d544605d86f440772b2165844f61c02d7b. 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/QM24S2501608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a15db8f89090d0c78779a361077936517dcdf1a4de65f8b35192a8385eed5b. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM24S2501607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdfad38472dbf5a3fa63757518a1df5ad362c45b6a8ec09d207ca887b2d8631. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM24S2501606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5468c4a841b6fabf204a423765d85840f5f85e8c5b141039e4880cc5b29f06ee. 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/QM24S2501605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9860c06660f098cb979bc57a0d4ffd13e1d96fb6188ca763a22460cf8da30f8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM24S2501432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c326e99e4070cdac7318ed48f96142027a40849ba7824ccb0fddab3e1eaf1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM24S2501537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0c60bf5469949f6bf05f3463606101f8c78f3931d1c8fbac8fd94ae31509e6. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QM24S2501536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf228484ebccdc212ce27884fd3f1dafd78b6e60a720358f2f4158538ebe3890. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM24S2501535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c0708c38af7eb55a238039e7932fa45d8e2622795983e46a5b30d0befdf741. 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/QM24S2501532.