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 0xc2558f45d548e80f124861e9fb96525e3de2fdc2e7a38f2db0c372256ece8451. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/358b8779-42a5-4b4c-b2dd-2209c73ed7b3.json and https://artists.proofprofile.net/proofs/artist/358b8779-42a5-4b4c-b2dd-2209c73ed7b3.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 0x41b5d864f4bcb06524246135fe9c333f5940068814207e45b44d8e1e79f6158b. 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/QZTVM2131784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9773a8ee3856a9346f40d2240408730c3abc3d21cd6af5fa7e42b6da3c3bac. 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/QZTVM2131786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066ece1212a601ab023835dfb162b8a41a4acba12eb407eefa5358964daaf222. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTVM2131787.
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 0xf2b4a3852d457b75c1d126227d86245eee18b4a0a97f7a8d0de9ed0bb015dfe7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTVM2131790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e22f5188da2bb187d368a4f8ac300d48ecf9dd71fd52963355e7d0d08398d. 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/QZGLM1956164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba160eb551c5319be5600354e8f90d55479cb9043bda25aeccca34386fcc7069. 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/QZGLM1956165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171e166d15f5a2b9144aac018b31edf949ead01706cbcf66be35b3063867a231. 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/QZGLM1956166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0dec2e9049965ff6744d7fa3b2d2adc92d06681698b22c227a30ca7cc1c147. 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/QZGLM1956168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff48b85bd0e244c7353fa5afa311073535e4e286f103d76f82c62584b11e21f0. 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/QZGLM1956169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d16228c40c0857c2a9eb86880859d09d012e73e456b6ff1307023aeab2da1a1. 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/QZGLM1956170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec221154aaa268598835217de3243afadc7fd7ae58a3502012140439c217f8. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZGLM1956167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067bf2f7f7d91c9605887e92270bd79f40c90eaf1575996ce2aaf70b9a18c480. 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/QZHZ52197673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6ce1c06e8d731e424c45caa85924771f771b87a5fe596570a24e8f555e0aa6. 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/QZHZ42085268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9034a51affbafaba9a39a320027bac0e7d8b0fc5c1a0772c8c67f4bd11139ce. 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/QZHZ32042816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0301d303419380fda9aeec0bed4d9ef26a74c6c446e40d9e8d9e156f715e748c. 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/QZHZ32006062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d01bae093250aa37425594d37971538c1d9c4171be177718867225324a240. 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/QZGLM2035460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c0f0cdefa3b95d6ae72eea7dee6fc76aba1e95ea7d5cfdcd3cbc2cd383bfce. 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/QZHZ51962943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bdb8b7931ef0f1351644d12c429114b4c2ecf3da65ec40eddc9647b024ae3d. 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/QZHZ41970374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc6db370d3944697ce5c45573ab453a04baf78a3d5311667b882a25513e362a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ41970375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfa471d5c78ee77371a4ef0d35b29d9a894bed991c269d6e6e6ef9f9dc71f9f. 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/QZHZ41970376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f69eff9e640256981216a67a7fbea5b0762570c7f4d52c7f8bc86cc5c75dbd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZHZ41970372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aa2288bbf318fdb6b594a08a37cfbcb97560315ca96f41ed647a9adbd1def9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ41970373.