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 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 0x392e699030791f9975dc5854b0a5cad1e2d9cbae6226f56656485d3ee63be0e4. 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/07f5edb8-58e2-4b01-8cd1-e287b09dc9f4.json and https://artists.proofprofile.net/proofs/artist/07f5edb8-58e2-4b01-8cd1-e287b09dc9f4.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 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 0x7a677b7cd977b61127340afb761754cfcd1e6730a64d1f2e338cdb0dcdffd7ba. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USDXS2003515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24961bbcb1962c79bc1e086f2dec6d0670686ad3c4eb06c3a822be0b90b0aa2e. 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/USDXS2003519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc98af70665651b6aadadae356d7772d935434e820491e8fd410afe6ed7fd28. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDXS2003516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19090394ec1a83d3b78b17ce830f8ac1e183c4e344598fd1f77423d10858c71c. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM6P42548684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c37dee42727bcb2ceb4d754fed6d13a419a60b5a18ad524ab03ed615c142e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QM6P42548685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a65d6d00bda2f194694436566ca508ecd5a9db7cec6317c3934bf31761c3d6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6P42548686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ca5d00c2a34ceba19692232db273af7d3f336dffaa5ec7723914725e0d7fcf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6P42548687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc70f04ca3d4943a57375a34526eba1077896a1348cf68acd72286ff120274b5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42548688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e2abf55bcb2ea9e29b659bce97b687ad6562bc1e8bdd0358bc856ebf3579a5. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QM6P42548689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31e9e33ec6fb7c7a4caf251bd7609ec1f9aba93798605ca588b786d2758d36f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QM6P42548690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c147df20aa725c50e1e7b4c13b2f59d1740eeaf80eeee247990ee382f5632. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6P42548691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a3632d2a49bc9ed28d6c0b3057593c6f5eb61246f62de1abebccce82e28a7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QM6P42548692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182d92f1658cd2b875a3fb08985ef267e19a21c0afb0c0706394eb06d28a0c57. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM6P42548693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1821abc7eac1ece35c46361e8c08064c1e068f8fd830b3d1284de1190a8d1dc3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM6P42548694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d90498af67256925909cf51079f3db6c3efea28ca4ec24421a7af4e2d698314. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42548695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6385c1735c167a419778db0993be7e624835cc264ef9e9c60ebb11b32ca6b9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QM6P42548696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a90f4054d5e21c29b49eb422de1a7e6991d925046e0a8b6d7eef79855195d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42548697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf84230dea270ac8d12cd3a73df5a18d9dba8afb9ff2f69bc8971314e68cd47. 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/QM6P42548698.