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 0xca5ad91b3e673105e9ad33155d8eb1b2afafd707ada2cdccea60b70b593f3c33. 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/e7b56cf9-c866-4b1d-b304-0eddd03b5006.json and https://artists.proofprofile.net/proofs/artist/e7b56cf9-c866-4b1d-b304-0eddd03b5006.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 0xc07f38c57ae632e817f807230d82fe6e8dd08c0741e5ba9cc2c2f0e734f1386d. 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/QZHN71956351.
Play It (On the Radio) [feat. Josh Dally]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0a29d452a66440881311bd79003072a825b7e3adfad89b27787b007b702251. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAEX2052778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22403f4a16f92be0c1ea32169856b12eda09cd6518725a82bf80344a8b9c860. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCAEX2052781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4a493dd774fa951ba37322a7c9e7cc7b3d34a59001605b1e6cac56c6f5f803. 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/TCAFQ2110277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a35a005fe357f8ddd416219daadd6f65809e4c5c6bfbcdaadaa7b7e855ea0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFQ2110279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782891af2c493825fd5f2ee44a828817402826bc55dc260b0f08ec17448cbdaa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAFQ2110283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b56d8dcd356702b4b1607df52edf373c1d867923b8356dbfd019a481d454da. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFQ2110287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0a7bd18987d12216e4efe6e81b3a5466ef0782b158e0be095caf3a058c0ce2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFQ2110349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddadd7c36bcff8e2866256b33d001f44fb87f12154c31b40360e85111113110. 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/TCAHN2340329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1371a1c89c50ff80f41217e8a80fb5c8a772be04c77c1558a1cac7badd01591. 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/TCAHU2488854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe7f6780931d956f3940ebfd0736ec67e9b24c5c3ae1feb56405c88bd063cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHX2497662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeaa6f639e97a8f0e546c82d66e197dc03be779aacea16e7d5688286f21893c. 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/TCAHY2458754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bb252c0a2426ae37df50f3f0b1cf4638ad679eb750538441116a88348baa57. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHY2459017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa8fe064c0a463a7bc1d634748c25f1bbae6db684521edbe05fc7203f2e83cd. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCAHY2459048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c8446c837db96e031c0fd51033f632027a11047703e1590aae3b1d98b4e16c. 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/TCAHY2459098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1f58e3b04310c2f598e2d03b168ad9d8219f529da77052143fe43b44d2ba04. 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/TCAHY2459132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63587dd25004114378c6a694ceb355a97fe9035d5db4a23310320400399c8f23. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIN2457504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b743d608ff21b1470e357175d775c2e5a6bb3ceedbee2d12934e028e26941e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USANG2518100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126a989e07c69b83c41c6b8b36e6b97350e6f7428ee83b3efb002f6e31b6ace2. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USANG2518098.