Nyquist may refer to: Nyquist (surname) Nyquist (horse), winner of the 2016 Kentucky Derby Nyquist (programming language), computer programming language for sound synthesis and music composition See
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 0xaae26fe49b92e4088c3173264a6771bb43b473bab23ed4544cf753430503c2a3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94c7a4f0-8b60-4359-bf9d-80174f26b5af.json and https://artists.proofprofile.net/proofs/artist/94c7a4f0-8b60-4359-bf9d-80174f26b5af.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 0xb05cad1fe14de863033e522ec2c32e7583744ee92b1fc64529b1bdcce15389c2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZTAW2333858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c47eb5cafda5a8a6cee69184d35e77c76075b9587a4f27f075347ce004c3c. 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/QZ5FN2499193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeec49157decf1927d6884ca0f6120e41f49cc5d7bf07f5fd62f5e71164ee59. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZMHM2560096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de2df55a64f715b452fc23e2c4239ff0c240de0a24acc69f5b42eb0371a47f5. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTRX2566684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcd160329a45706cba6b083340416af08badec917ec11f53bc578612ba77566. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZTV32541203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef823150b05e202310f12ee1ddba0a677cf52b3d34d45e451aecad9f97c681. 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/QZTV32541260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a450276c47e6014c81c04ee21338fe1b51d480e76ad8e65de11e41affd8054. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTV32541297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc13b501a8e65b6d27e5a2ddcbf29c5801200725dad49515eca1420552c4ea2. 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/QZNWW2325840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597abad946819ea3512aae042c2744b37f0d69df98f1f7f5c243b1ffb5210ef. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZWFQ2340954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256ea7192970f45c886f56afacb9538b3cbb3d43e971851b3d2a9baa75ebf6ed. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWFQ2340957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb36a23a924d068139559b9e8f25b3753aa77e99ed83c264b49fbe91a68f55bc. 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/QZTAX2212533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfb154817c70b675fa00b0f76a4e522afb24bae3daa5f44d40c874523caed97. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZWV32419723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9c47eb5cafda5a8a6cee69184d35e77c76075b9587a4f27f075347ce004c3c. 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/QZ5FN2499193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c46ba7327cc84fe67c215a2044dd3cdb41a1891a28e069ab428ca6d8df95d32. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBRKQ2472502.