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 0x5a1219ee61442ae06a7ca4952515ce2732aa725ccfa13d338eb2b44e9dd3d989. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cc75d3c-8808-43d1-a0cd-f7623baa1463.json and https://artists.proofprofile.net/proofs/artist/3cc75d3c-8808-43d1-a0cd-f7623baa1463.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 0x97249e4e6abe5fc12cdd51646d5c5dab3d34cd3b2494a729f874b2963638bbe4. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USQY51470574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7908af4e7085df046a94844c1453dd13d2f354e575a9c0f1b861da0c4a8392ab. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:17Z), 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/USQY51470577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39453ac1f05a30736aa36468e6ec05cc4825018913e44d055f3456080be255b1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USQY51470579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaccb4851616ec92207cc156fff415c2d109c3de6736c4770ba20133e9fb734c. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USQY51469741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58dbd35e4e0050952127e9e78036f727b21fcc70ce8b2e81eda5812139ab95b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USQY51469742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74063b70facb0612cabfba87ca228d5dd60ac4404f3660a79d144a6659c4fc23. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USQY51469744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85520301aa8ecdabe0605d5527afcb7c9e16b275d44b17a2308f82026d996950. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USQY51469748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d430272cf334fcdeb9373b8e687eda6c4477049c869b3dabfb851049fbe43d4. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/USA2P1454261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8228793af4961cfb2ff2f0d849d541767750078ad2d49d47fa25a23df5a23c80. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA2P1454267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa74fc68fb5a1bb8e1745838498117231ee99ef92af26b87aa927b5b07a8722. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/USA2P1454270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297a4fd3795e1b732f72b0fbd95a49bf65c4e21cdcc148b744e642ba467f735. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P1571162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b032e5a241f9cfc25e22f0520961d4f9b5ee5b2e833d2e6867054f19fcd110. 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/USA2P1571163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8cf1d33aef076ebb4276d234482c5e1a15424999f2f90d6328fbd3f13df311. 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/USA2P1571164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f5a305fe6654bdbb53cafedd59a0ea227004ee8dbd72a8abc29f535a2b163. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P1571166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fdf039ff3957c3d3e3c91072fb2802fd886b117288e8a2f6c7613afbc0206a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P1571168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831aa2f5fed043d6f7d029222b547d102b55a1502083feddce6e83e24193379a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2P1571169.