KaS Product are a French electronic duo. Their music has been considered part of the French cold wave and electropunk movements. Formed in 1980, the duo consisted of Spatsz (Daniel Favre) on electroni
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 0xfcd97f2814c8c1788a6639edc0428617edf3910595b5d8258d00f25bc8b537fb. 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/a4829395-f316-4e68-8cff-d2e2c294cbb4.json and https://artists.proofprofile.net/proofs/artist/a4829395-f316-4e68-8cff-d2e2c294cbb4.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 0xfe3a4fb0397fb2c0794ffd4f25e34136f5621c7f5fc3f76c7b18bd6f3eb406ae. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRPEW1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ce2f9f5c326d7fb89c5ca881d38958f3758c553e1dee66445effcde96a6178. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRPEW1900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85aa2226320bb9407636c30c6f4e4a98738fe0ff464870ccc82aa5f396fa97. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FRPEW1900220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9312a09777d65bf945f447494d7a40b1cec4dad5f540d020ff21269f92c4aa. 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/FRPEW1900260.
Black & Noir - Mutant Synth-Punk from France 1980-83
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d101753c504da43e322d6dd59098a15a9ace766600046d79ddbdc63be6c6d. 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/GBBCK1601091.
Soul Jazz Records Presents KaS Product: Black & Noir (Mutant Synth-Punk from France)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d101753c504da43e322d6dd59098a15a9ace766600046d79ddbdc63be6c6d. 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/GBBCK1601091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114facb811e7bf2b1761af015769c80d7fd6b337ec8aa381efb90ea1ff6f702. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBBCK1601094.
Soul Jazz Records Presents KaS Product: Black & Noir - Mutant Synth-Punk from France
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e3c3bcf6ba23f649fafd761bb7bed86da52c4e60117ddd2f94d1421b15548. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR7Z82400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3cda39e9b1f90dd2fe9b8921f5ff1982c907faca799fd0b5d77c8b201164f. 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/FR7Z82400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4658dd409469fb0847fee47bf14bbaaa10fa84f2b1f3ad885cd64d287118303. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR7Z82400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e0548761754066a94ad30c0210b9b1021dc82d44232a7a8dc388acf5e477e1. 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/FR7Z82400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c7614c1a1ee29c26a733e40bed1ec9cda0fb0be6d354658a44bb2786001c84. 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/FR7Z82400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da2698263c50b9fd8479a40f5d960845f01171627723b1a30b57cc63ede64fd. 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/FR7Z82400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a22695716e4c4e00f99dda206f7fe6383cf5621f92b1fe245f39da7de6a1ca. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR7Z82400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f3cda39e9b1f90dd2fe9b8921f5ff1982c907faca799fd0b5d77c8b201164f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR7Z82400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4658dd409469fb0847fee47bf14bbaaa10fa84f2b1f3ad885cd64d287118303. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR7Z82400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20e3e3e15b8d250b995183ddc51943fad00205cb1bd69c409b04546b13b0b73. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FR7Z82400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e0548761754066a94ad30c0210b9b1021dc82d44232a7a8dc388acf5e477e1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR7Z82400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e3c3bcf6ba23f649fafd761bb7bed86da52c4e60117ddd2f94d1421b15548. 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/FR7Z82400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1d0c9fc8fb5efa60d9391ced9333c81c6ae17f84f6057ce52dc67a63afc62c. 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/FR7Z82400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47578cee844b6cdda2c8d10cec9c41f0fc4b2f7dd4672acb4e569a4e7a5768ed. 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/FR7Z82400131.