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 0x0e4acbcc24a602db56becedc731e51c193040c6f50194441613e2002cadcf849. 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/1c388ada-7f39-492c-90ab-2eff979b529b.json and https://artists.proofprofile.net/proofs/artist/1c388ada-7f39-492c-90ab-2eff979b529b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Straight Outta Reiger Park (Wie Se Kind Is Die)
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 0x90ba861a1c92515c8fb5edd290737eec0214d5f3dca0a3671d7da3d8decb904d. 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/QZNWY2076343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72bb014f37aa7ef35f2c1bb351f59f3cedc2dc80e8fdb315a068446972525e4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNB2121976.
Sy Slaap By Mr Cee (Sy Het Haar Eie Key)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e193cf8980c0055fd4b04e00bf4860beeb00354a07bb109e3544e41f05a1232. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWX2137974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ed857a8d8ffd3dcf39b288e8372834afc34622a3fdbd053ae833230b941770. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6M2274251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ba395dff4f37071dcc4561a2bd546b24feb8c0e0762e0ab9b8992fcfed2627. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZPLS2265164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02654718f78fda2d5e1765eab69f673e11700925473901ab4e62b415d99c6a41. 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/QZTB42416966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718e54c4fde10a902f0346ff1abb8ec4a3c5d9f953788ad9daabcd51d55f6dbe. 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/QM6P42503767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d001bbb983b40c7e2441857ee4da1eef387d4910d0971f9bdbf51c060d0105. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZYFZ2447642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d943d58baf89666cc3908153ad475079807bbf3417942e76a804d2255f7577. 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/ZAUM72300239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d83ab7ff8cac49117c001ab3b80f2aac61971f5ab18b9c246a4ea397ea2e9a. 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/ZBP2U2400011.