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 0x0d70413f3bdf5fa5919a373b4c0c9b2a567bcba4185f4701b1b02304624b28d4. 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/c522bf59-145d-4bd0-9361-ba3dfca06e9c.json and https://artists.proofprofile.net/proofs/artist/c522bf59-145d-4bd0-9361-ba3dfca06e9c.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 0x96a64b630e7d6b2b196ce1906ec2230355985a8437173b4a013596ae7db3182e. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/QMUY41800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c7aeb41180263df5e736b64b41a81f4fcfe91e49a5ca25cd60813686323875. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMUY41800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4668fd9a58e99a8aee0f00677cd970993103cb04b73f259c5e4c23a368e124. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QMUY41800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3a32e2ebe88445cf92b2a4981e4596cc9fceadead67973197d82910997bba. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM6MZ2034846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eee917516e2107c334774095412584ecaf28456177148909a2bf83e8aba09d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6N22084060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffd071d933aba5f29142b9b7dd3ad327842b6ef7999654b65eec4a65344feba. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM7282088432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a08732e6a19f93ca31923df2d0d9f3c62b722f367cd5a4989ba36fcfb37475e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFME2009519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9229a2b6142d2c016f5d93312cf50750473f548b73a9b192c4df95871be47a86. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QMFME2009520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82efcf0c3720ff60274a4c58b05fae9662488c94ea31bfbfc031dbfc46ba0699. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFME2009521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f612bf49e3eec5acd11cf09061d1a5cca7e392125cde3c1f9744482c1e1fffb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMFME2009523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3a32e2ebe88445cf92b2a4981e4596cc9fceadead67973197d82910997bba. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6MZ2034846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628a89297c7f2c77afda85b8ca9e8feb52793cb7814ecc5bc97eee09375f7b4d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFME2009525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffd071d933aba5f29142b9b7dd3ad327842b6ef7999654b65eec4a65344feba. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QM7282088432.
Summatime (feat. Wale & Radiant Children)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459fae1e665d0cc21c765005c15ad34c2f5458d00dfba44cdf7c3f67f2a2098. 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/USRC11700597.
Insecure: Music from the HBO Original Series, Season 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c1198eca389187efe96210f488f36cbc1641c0845a86aa9954a2e298929abd. 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/QMUY41800015.