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 0xa62e9958c49ac0c9c547d60eb75186a1c970e714b2c233d478762b0ab05aa149. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8492bf13-6641-4ce9-b00a-1ee056f385f8.json and https://artists.proofprofile.net/proofs/artist/8492bf13-6641-4ce9-b00a-1ee056f385f8.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 0xcfb54cd2f9790264cbd0b943491b90d839759608f37bdadfe8f0db0ab4d27099. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFYZ2271751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad326e77371b608af06002ab94c80137038bedce5d11292fa79ba12a810c02a8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:59:04Z), 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/QZFYZ2202941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117d1759fbebd0ba6a0523b8a93e7a0c4ccdbd7b3d1eebdc82d1b90444c95814. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZFYZ2254645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200de774af0f5e80c28b9fba82f4304fa8b07d17c1797b84c9afdc7c62ebd416. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:34Z), 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/QZFYZ2271564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f07e06bb92d9b440abb14aac7696755c8b0a03413c5bd16e9606cc196b3d30. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEP2318697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed9a69d69550f9b67d2b840960b5b8a23b20da324d76ad797fbc82645e5628a. 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/QZES52470029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27284fa4243565123be2c712ec6818df9b5740e45d869d91970e3630c94d8aa. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:29Z), 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/QZHN32404777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bb49a46d4a08095acc1a2878d22bb3757c32925e073f816b83702fc7e15276. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFV2429096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57d32714bf0c0872c0362670618a3bb83ed8c2d826cea8f72bbdbe3ffb3124. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92524632.