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 0x799f24938bb79dd563b4804000633fb6e4e748746ff342994fd59bf142599583. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea0790b5-d2b3-4cf4-99b6-5c66fbcd2f61.json and https://artists.proofprofile.net/proofs/artist/ea0790b5-d2b3-4cf4-99b6-5c66fbcd2f61.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 0xfe8f485429e06c7a3a695add8dd7540c20abc961c0063f4e7ecec11955719aa7. 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/QZTAW2412840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf32750b5cc57b6807031705d34a047923050222a8c60842424b812affd719af. 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/QZTAT2415073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d465ff9d770f62044034d6359bedc00c70dac751b180db4a1eafce7e3f8e50c. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTAT2415074.
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 0xd1dab34b31cf6ce25101ed4affeaff34fe02def8e1b617767ccc876ec5c2a1a6. 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/QZS652115417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d7e96b0d97f867f23353d216438d36329a76281b9de276e13230ec5edcda8e. 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/QZS652196661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afebfd11be11933cd77eb331f78fc9b6ad4ed510e2bae3989022e1abf58ec81. 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/QZS652114793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffdc2d3a7726aa0e6393c8587a8edb3ddc6be286085707d1061dfe94a973c30. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZS632106974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea717a303b5ede5f8e615c47433fc043a248611c4dc570e50a7baca6b3bcc24. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZMHP2078601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a2e899dfbf16bf6285618b18903a80904fd892514d9868c9ceacd909f47873. 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/QZMHN2028626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7974cb165fbfd4806615b88cc71d0f6d5fcfb97b4a40bfd2dc597e94b85d69c0. 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/QZRP52548291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ff25e34a13a77945268b9c6d154a365e595ddf0dd7c7f1782842d7d59a2576. 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/QZRP52548292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba42015eb27f0c99f42a2f950411b77196c968b6176737839cbf8d859c7787. 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/QZRP52548295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60480ca46158692ee1a138be03f2f42d8408c98f320ac09320c10583ea396c07. 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/QZRP52548297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437e12f317cc619dfdcf7a8155aed8d11719a9a8cfc2f6ba2aece3759ad0c33. 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/QZRP52548298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccfd05922814684a788cbcd88829e9d212d3b8a22e02abf2b92ddefc9afa647. 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/QZRP52548299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc5bbf3fb732dde36b09a08675a0cbba0116faf6b1cf267b7f54771d9177bcf8. 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/QZRP52548300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9483e1c3e5b52cd520414617d24dec82d2f7eccff0e60d28ecb3c2b97e7dd42. 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/QZRP52548302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6e28217c300e8ef29dd7dbbd2a44b3189e13ca6b7872db562c243e3fc3191. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP52548293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf9b7e689a0f4cb6f5ed1862caf8ba0347f43669c88f06450e428c2e9df0fbc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZRP52548294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae2c5dd8b4ec08abf86ae7af32ce35b5af2dde4d10141328a1b3b57f757c3d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP52548296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b0cdce652c9dc27aa59413e5dd2fce4431726cd7d334a0d979fdcf0b14dd08. 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/QZMHP2577602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe476f76c356ae3d14b1740a90871037bcd1154a42fbaaa84a0990f2760598ae4. 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/QZES92555496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58941da5037d277f53f28fd1f914004bfd035d40671949a0eea45eec2d68eb64. 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/QZES92555497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe433aa115243dc521611a51ff39e33785f9dde2e89d17bf59113d67599b66feb. 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/QZES92555498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513bd433cef86e1e747e5a28b6baccb6c9198e41e51a1fb10c469d09d2f25274. 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/QZES92555499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f025e8ac1d12d11067e80d5d00ccc49e56cb9bdeefb6ea3ba63a3f388b3bdb7. 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/QZES92555500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cde69849af5cd4536d16368585ef18fc682bb92a45019eaca63e2473b42bfe. 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/QZES92555501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf6215b828ac00956908077e0a1f78acf8bbd3fad6064b6b4b41bdff2cf5f1b. 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/QZES92555502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1723d872c764c582fe9aba07b524f6bf06093676bc0c7b495a9b5db9df12ca8. 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/QZES92555503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1851f1be989649296d4d7b92a569177a89d35c40a68a53cf7c0d3287a82eca. 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/QZES92555504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b62d4be6bd4213e58af29786acdc26eae442696ffedc31b0e66b75e9d67947. 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/QZES92555505.