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 0xe0891ba2ebb15fd5024a664153987e5e67e65dc4a0af1cfec18eb436de83480a. 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/510aae91-2e32-44ae-ac3f-1022c1d6ceb8.json and https://artists.proofprofile.net/proofs/artist/510aae91-2e32-44ae-ac3f-1022c1d6ceb8.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 0xf6618069c001380a9f51ce9d4cecef0b1a34c2a8d06234f8a5d4e25efb98499a. 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/CA5KR2155166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f740fbec04f70ac8a9dbd7d85e5ae1ab7052c3781ba4e1129d38dac3869fbe3. 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/CA5KR2020862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb772d72a1fd2067aab859952e6e703511eaf2ecbca4d9d6470ab1970133857. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEWO71700378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85551fece4e99b062d424c4e49dc452f70611c231f347a3b5b872812e63811a. 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/CA5KR2237595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d0710934e334df94ff8692565ef3d68b1dce26610006b2b74bce1204903a2e. 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/CA5KR2225904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b639345da4f1967c5764c8a24d625eb069bf136f99a9e8dd1d05c599f88170. 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/QZHN52049725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1462aa00d1cf14436d89fa95fd486a327e41d9c9116420d566df24df0408efb3. 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/USA2P2349158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87586c086bd18e204ff1b0c60bfc092a773957b6d4773fafb604c84dfe06a2e. 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/NL8RL2317512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dae03d900700e951a84aedfa8ee5643eca6886bf0928172cdc6752dd95001f. 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/NLRD52319394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ea325af0ae74eb4eae739b71bf59c9b637d1af4645c529afba30faff134450. 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/FIBAR2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff58f802bed83001f453c19d121a2d9ce5ff05aafb0aad1a078be4d95d35d7c1. 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/QZK6L2031127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04badb68718ed0b5a94862c919c9bf970145714041c96403a55c1a9121e59491. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYZ2075520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623b2dc6a3b7b6527e36ed54c9d63803e3cc1a3aa1ab1e9f57935e130261d76. 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/AUNV01900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c9005615d7c2949ee0658ffc07f6504f1367bf902a2fcd4e5263ed2fb0ea20. 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/CA5KR2252798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f6c204483a97b9c1e950188fd62d93e47ed2ca6a9e18fa116b9f7c982a8e26. 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/CA5KR2252802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa525b0fbdc45b6264755d3509d085789d958d8cfa854be0d82c9fe6b7b6efa7d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2250595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5502dbf41e20371b89df98fe62198b2d00815765d97d56617226cbe40e7e49b2. 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/CA5KR2255045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd312699bfd877e1516512c26e2fed2d210355e81c392c91f766bceb517c48a. 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/CA5KR2257733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b6b76caede9875a09f2d3cee6d05c4d0bc5e5cab636c1c17f53d6049816a1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2257736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de7fb215082b38a63d6cde1c2c9d19cb0cde7dacf6957f1aa46c3e102086d62. 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/CA5KR2300811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6618069c001380a9f51ce9d4cecef0b1a34c2a8d06234f8a5d4e25efb98499a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CA5KR2155166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6618069c001380a9f51ce9d4cecef0b1a34c2a8d06234f8a5d4e25efb98499a. 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/CA5KR2155166.