Christian Korcan, better known by his stage name Jack Holiday, is a Swiss DJ, record producer and songwriter, and considered a renowned figure in Swiss house music, well known for his collaborations w
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d28cf8e448415c048f5fc86c5454f902788e583575cf2f913bcf77e1301b84. 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/4b08a3c1-cc23-4d67-ad22-ecdd3a4edcc5.json and https://artists.proofprofile.net/proofs/artist/4b08a3c1-cc23-4d67-ad22-ecdd3a4edcc5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cf7db2d54354f9eb001e4770d774b0d364c0bf658618e693deaf60960c9f9f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CH3131200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd325499c7b8c13ef1c2a6c11653ebd958c92ba977be935fe724039d2871f2b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CH3131200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288c93dca664889d3cfdaa668ad2dccb282f7afbdefd4037c88e57f042e066e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/CH3131200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cf7db2d54354f9eb001e4770d774b0d364c0bf658618e693deaf60960c9f9f. 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/CH3131200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2bea3d2c5e0103873b5f718bcc9687fdd4ae4111ecd19c547f9090a491edd0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CH3131200353.
The Riddle Anthem - Jack'n'Mike Festival Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244db19e8fa5f6b4f2777d3a17984f7359c934858d4ace3e0b7090e7cd14e653. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CH3131200354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dfeb1b9d655ed093a8791ad095c137792c6b5654b9928191b86db3a6e8826a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/CH3131100353.
Dance for Your Life (Dany Lorence Remix)
Encore Une Fois (Dany Lorence & Jack Holiday Radio Edit)
Encore une fois - Dany Lorence & Jack Holiday Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c02847050c85678a9112e59f9c452f9767e94811902a476ab1453e49c1cf1d. 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/CH3131400050.
Encore une fois - Dany Lorence & Jack Holiday Club Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382ce2ade1b383dee733e96e9ec4eec82ebd1acbe6789ab841cf8e5e9dcd928. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH3131400009.
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 0x3f665a7fc575669fcb0a3bff321e17c1c94d7a435e706a0320ef203f01ebdbe8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/CH3131400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d6a28d0be5b933289e0120a9b60ce95fd96e9287c71ddd99abd9d78cd27c15. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:27:45Z), 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/CH3131400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a90fff7b7a255f41f5da7d6e812f1b27524514a5bfe6939e372036052b411bf. 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/CH3131400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac117a79fbca54e8d1eb429e20cfc5380029e83edbb96ac0c8d6b12bffd052e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH3130905099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafce6c24baafe2cfc955203493aee877db84fc868cfc1dd2e44e1ac379e4dfca. 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/DEHK90911701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ddadbdb41abe35d1b3a21e7846e0e552602562b5dcde6a2082f1dad1a3d83f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEN061800829.
Living in Stereo - Jack Holiday Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c8959c700f87b6320b264e49aad733df41ca8bdd0edb1e2bfa48f949a727b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEHK91370915.
Kontor Sports 2022.01 - 130 BPM Workout Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3bcf7675778942e262ad7299e51d4ef5cabbe1c405a65d8d13e6b39a7ad357. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEN062200092.