Nonet may refer to: Nonet (music), a composition which requires nine musicians for a performance Nonet (Farrenc) (1849) by Louise Farrenc Nonet (Lachner) (1875) by Franz Lachner Nonet (Villa-Lobos) (
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 0x1124de1a1b33ebae0d381be96333e531158fb5fd00d328a2d295ab35777ab7fc. 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/8ff8fafd-9ca2-4a22-97ae-367c0bb9ad5a.json and https://artists.proofprofile.net/proofs/artist/8ff8fafd-9ca2-4a22-97ae-367c0bb9ad5a.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 0xb5c6b13c02334206b21ec277572f3ee139e33e446035e4e69cfb065a288226fe. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZFYY2455298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f9785f22ddc97d6d2e60605ee3b9a2302d2fecaeae65adc54a9df1d63bc4f. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZNWX2449570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaf7c2e3371a6357d6c04e4d449658d2863b8b29c98eea9020cf653396899ed. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZTB52451315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ed425e6df683193ed6575d8f87814477de6914e2b02b12e487904c9f44a49. 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/QZTBB2454779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0092ae3df0825f6b0f1063ea33437323eec311ce78db2a915db3e084b1829123. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZWFU2447059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5708502e46172f51316c6626acf279fb19f3e774c7061ea6bb7427632676434. 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/QZZ7K2440206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23787d522b90255d396698d8f5bad02d0e1e4dbde61a0129e9ad30bcb77d0e9c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7U2435953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe028cd9cb99bd6b5dcf463b205734fbe0a9eb8827558753df08a230546996a39. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZDA72591358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4358eea5f31e3413bee70579de5a9d3d28327ca41f1790d8d185c1e0519d3f5f. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZDA72591359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f923ffb9bba9f632027c5973edc083b2add82a8363f92a7ef598b21424e11. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72591360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e70e858e6c3021658f39c705b35656267aedc691fb388e758c458761d650c6. 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/QZPLS2580030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb25948f5bc7f3673355ed017485ec803064b0d26102f71b3e93becc317762c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFR2582214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58e355ed226817c6a43e5a1fae6a9548885831327d751305247526079ea6f4e. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT3F82575918.