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 0x98a401999c3ba0f49ab599710bc91c76d0e7bd4cf5aa638326dda5fb516f31a4. 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/6d839bb1-64c8-4c61-9722-158201d9759c.json and https://artists.proofprofile.net/proofs/artist/6d839bb1-64c8-4c61-9722-158201d9759c.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 0xd68f46ad287e79d9fd78bfa8e62ce82055410db61a7f66c442104cd1c8e9aff9. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NOGBB9904060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447424d35353ab156e631eecef588fc7dc06b464443bc45378be6b68210981f4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOGBB9904150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ca8bf3be13cfdf537b18a7b797cf7c9592f9aea550d7ff5efa2dc73f52068. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/NOGBB9904210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80846c8a73b553101444a22d40b1fc47de89b7f7dcbf5ee502855653d4b1ba8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOGBB9904230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6352f7e90ac9faf4c4f0f23c8374ab54ff2deee5e89ae7b06a7a804638781024. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NOGBB9702020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda895b41b712f4034acdbb623721656c297fbf6051edb407e7f7081c0e935dd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NOGBB9702030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572f205cb05b9fb49e8dde8e3270f21a4db45d29644effdf18ba0bbbc61c35c6. 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/NOGBB9702050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e557f942b0e6b003514ddb50966e1a6cfe6e86e7a705b1413b36a6bccbdf0ed. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:23Z), 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/NOGBB9702090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe524f83ec30ecb773101a630eb06e90988eb936c777dc782f79b598729b8c209. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/NOGBB9702130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556a592fce3fde2ad277d3361afda46a3177cbf1d92513b18c63e250be361600. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOGBB9702240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e48cb3f94e7f5348bd73bfbeb9311bc8f1c5f094eabfc214e1b65589bd991. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:04:41Z), 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/NOX9X3239703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3334b0944102aceed350026aefdcb9bfe55dfa05aa371878a2abc3477faaabb1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOX9X3239711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deb5ed3276708186f5f1bdb9ab4b1f6e6edcaf288337082d53ed57e0f6520d7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/NOX9X3239712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc15cd6c6a25e2b94eb6c0a901af664dd396004f851755e6f4b55d60a3b02e4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOGBB1720020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff87b9339e163ff05f9b857d1cf6d5c60398b02fa5551bb062c8ef1cdbe8cbb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOGBB1720090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7356eb609efcf5d7aa18f9d0fb42e3c09542e65b494e01c461b42df2ee7311f2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOGBB1720110.
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