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 0x9d6ff4e7b4d7ce6e6a20b7b1b6e61ef3304f6cb3cbd4cdfe95b83a12e2fbf11e. 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/2fea4409-c8d0-420b-8e14-0e1d6149865c.json and https://artists.proofprofile.net/proofs/artist/2fea4409-c8d0-420b-8e14-0e1d6149865c.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 0x2f851934e6c1bbe2e7b9351c2666099761bd1acea40a5b9933d915e6a58dca9b. 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/USUM70846654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b0ea0671ba33fb619618f9641fc4e62ed2b22ac2d6eb8143cb7e18ce3db43e. 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/QZAPG1741522.
Why Am I Treated So Bad (with Questlove, Christian McBride) [From “Norah Jones is Playing Along” Podcast]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27da492e498bb3d226f5b491514be742da21b49af54d4109a12f5ef4692a24e. 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/USUM72313143.
WAY OUT (feat. Milan Ring, matt mcwaters, & ?uestlove)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95498958ec966a0737a066f3b3bba6cf1896f98e14fb7529cae76d85498e77. 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/AUFF02300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acb43710ab2b0e8a2c27a6c5d26406ae942b9a29bfc779fdefa40c0914357d7. 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/US3DF1301475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d100a9cbd40576aababcbe40f6a756bf1645fe30a93e12193faa2641877ba24. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USBCE1010044.
Studio Talk / Water Get No Enemy - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dee117f81568e3e8614022c048d791626b13106bae744a5fa8ddff25dd06e7. 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/QZH5R2000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52909c6e6a063f7193c969dfbef6ba3e994f950861228ad45e1967efd6d331e3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM9K31200297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c88e78dec0462b561bfa9190eb881e143bad4f98dd3a3b2e18f1516b56e3fbe. 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/QZTRX2394084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2589dacb6632d85a2fcc9541f6fa59a5651bb118d1bf4ad58a502876ce3f6fc6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTRX2394085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a7e232d04db8c45d8cbdc0a5d15b08c1ac8cf453e05336da8c33fc8b49d91. 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/QZTRX2394100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9507fcfad5ca57111c4f9b8cae2ac68f79f5ce0a38a0c50031f33a757a2499. 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/QZTRX2394110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad47a2e17a183948ebd504d217ed7328c71161ca5323874e3f72bb022b30b90. 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/QZH5R2000292.
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 0xb955e645596878b5f0429e0a55244f5a1fe7ee39137d9d766ae5b8a700daa01b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZTRX2394105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231105a532740635e9a58b8b169eaaac6835b4b1be1f4206d917f22381bd5634. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTRX2394106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f8f1780194738626f0233fa31e1423c250b2fb53adb1b2303480e4d482d228. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTRX2394108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d8ce17117fe155652be60b1d27581e5add9830f6042d1254afcc7ce1071674. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTRX2394121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d63549cf993686dc61b3ed7b999548645958d8b73e7d1dd4a0dfa4b941d2d04. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTRX2394123.