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 0xfdc09d1435526945abeabe46e5c249739673b2294da41c8015cc070b4c6e7bce. 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/f46e3e1a-8f93-4d00-ba1f-67eec823e7e8.json and https://artists.proofprofile.net/proofs/artist/f46e3e1a-8f93-4d00-ba1f-67eec823e7e8.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 0xe58ef9f35d7bf45150ff4a2f5f737ae4bfdd06bb98a99d8c30f70e552c0e154e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCACX1725386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14afb919256f344909be3703e018f23164980363f393ccbbd63da8bfbf3188c. 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/TCACW1753899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02b3a37e4446133a9acc68d8feaa5b5789b11acac441d577a74083413f8fb9b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCADC1729584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f06bed380ab9ab4a72602670204f0f66b9aeb9fc555b755f68b2c447b07f22. 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/TCACX1725316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727e5c8fd8e379b66d3bb5ba3fad277399a16ea1615afdea506a1125ac45502. 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/TCAEC1977851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b419e079a2d0cb8ef53329ad716f3d184c6ce6e11e56c2f4656d075587a0b. 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/TCAEC1977854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc2739c66a77b98ee373b62b96f5d4a653d3d05d3cdcf3769e666e0fedc9dc0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAFT2168083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997ac78842f1d514ab64d90a1ad959dd27cb9049e1012359545d45d742f003c4. 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/TCAHH2346220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7a87a6d56e68320cba706719dfceae86e1e15f9536f9a660b6714612dd2f35. 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/TCAHH2346244.
Shark Tank (feat. $ha Hef & A$ton Matthews)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39bd5f40460081a4dfc4abd04b13ca664325b522d0fa724ab6b25d9e6d28446. 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/TCACY1730985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd565fc8ab0ac1358786e755dc324b0c9e19c67c38f52d869158924c9fb67f739. 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/QZHN52024014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50965acdfc4894838b1a0d725b7047680405f9dd013db2af71382572586792ef. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZK6Q2146397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b83ec22f2774297981d4b24574c0ae299b8784136d24b00cb09d4a1ada2fab. 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/TCAES2017748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e908444a0513954a07a141c821676a54952be6ddd715e2b0c03a58a7d605a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESA012043961.