Grzegorz Cebula (born May 30, 1981), better known by his stage name C-BooL, is a Polish DJ and record producer. Career His career began in 1998 as a local DJ. The first popular songs in Polish radio
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 0x13e143ff7536cc103da8bf648c66ae2747c5a12e90022252c7142189e7ce28f8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/469f4a0b-c52f-4a08-a968-9dbe997982f7.json and https://artists.proofprofile.net/proofs/artist/469f4a0b-c52f-4a08-a968-9dbe997982f7.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 0x1b965068bb1575e09f2093b9f98f27e3c46a4b41570c097c91f51d128e886dd9. 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/FR10S1680471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81c282eb91fb0d4a2e21837827d545b0f072d461cb3e60b053b87fa9a79ae4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOFVD1542010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54132187c93e2593c5eea1fc267841e2d8357b02f8a3dcaa59e3129b15f1546f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NOFVD1542015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af6a682b433cbcf5bfaae1e61b3cffdc99fed684b113d4c56cc900a74deff1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:54:21Z), 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/PLR922525210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4378dfe2be2e7f8d00c384f4b1b3a3495d7fcd37bf5b45fd869c4dd8670c2431. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEMA61500542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134f6d03e646e4184edca3702295c6a3481886c35ab8c7b6739fb209a11de949. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/PLI362140850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf774de3e252a849bda21b91c966ca923a3e52f37f770905ab4a2f8a3bafe91a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLI362140840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c81ce9cb5e6c529c1efcd8c64116e92632bfea117a869492dc8cf8b631dea. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PLI366715600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefd1bd57178dde6af09105f83f77ba4ab243a6b6448905c467fe67693bdea12. 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/PLI363070140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36282c87d047dd5287f1044a0373bb5f589ae81de08574f56e5e7422dc34eeb7. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/PLI364695740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e03ab0537be9c45c0d9ee4fbefc877a2168c9bc1682904f83bde0d0e665aba4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PLI362857970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9516525107124d4cbfccc5790fda7eb5c0f1200ffdd62b924a10dbf193a2cfee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/PLR921616101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8c64f11f01f8bd57482a38aa64f0fdaa0b1e5d172e2637d9a66c6140740db8. 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/PLR921616102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129df07050bc1f580f6f8d15f1dcf8c05c4df877113e85aa31eef864996d4620. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLR921616104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ff1c2b63360b512e09cc12302874cf0e8b2bcf3782aed14cf44c7f7469239a. 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/PLR921616105.
Never Go Away - Groovefore & neeVald Radio Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835a3dfe4197338fbacdde3f46aa1879f853ecacfc7a41610a6af0fe2fbbf6f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLR921616107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e778e2322418def184b419036789253856e37bdade54305999ad26c30d81d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLR921616111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc870efce3222bb7b5b192d0bfb44811c62acc5078cf420d674ca1ebe4f79d621. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLI366569760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9516525107124d4cbfccc5790fda7eb5c0f1200ffdd62b924a10dbf193a2cfee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PLR921616101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e60e9f48c967026c1eaea0b244d24f2a034b6041c71177d166401e693997ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLR921717101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a95e8793534917c61a04d342dc037e8183925ff98e21103fb527206e8dac63. 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/PLR921717301.
DJ Is Your Second Name - TWISTERZ & Waveshock Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633bde667e87958981b076a91452a63731d0c13698a2f9b90b4df6c05b89d9e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLR921717302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1ffd07c1e5639ee5e41356f3b4401e7f821aecbacdb960bb3a0c559d8eb14. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/PLR921717204.
DJ Is Your Second Name - Twisterz & Waveshock Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb633bde667e87958981b076a91452a63731d0c13698a2f9b90b4df6c05b89d9e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLR921717302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533cde46947214fe58034a5ce4121d40946d5f331db85f9a3f0b800274c45780. 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/PLR921818203.
Wonderland (Giorgio Sainz & Distant Natured Remix)
Wonderland - Giorgio Sainz & Distant Natured Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f556b9a217be9c563d600b0594d39797ea62e4201c6be3435e82576c0680b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLR921818204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a95ce4aa83e5b9ed9bf694a7127d6e52a02cc53558836aae0352d39d705e471. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/PLR921818205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807b3d6f046f3540f3fce24ed2ec569a0b9a7f3ddad406d00e7f16286f2814d6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLR921818207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c23676b3c1dde0ccded0a3ef07b17c08a1c09221fb60c1ff58bd0b24f3f5420. 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/PLR921818401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36af18bb4e9c2c190ddcf0de4eeacecb413e69eabcceda5d74e772425419cf6b. 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/PLR921919202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d49883482a08bfa8c88b42a3ecdd8859ce558ae6b9a915a39e186c3b79594ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLR922020301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce6b50b0d92f4a117e96c9435c1a868021278554731e4718fb450cf895bcaee. 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/PLR922020303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1026bd74eac063c8820ca6f3bc229a6dcec1e327d01a62c86ebe787a9b01da. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/PLR922020601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed87c8fd281b1da9346cd76c425c3e097aea16e715cd528928222ffbcf04850c. 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/PLR922121102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ca0df4aede428be4c340fb0e079cd5cf8b667f0434ee96e0ff4796efa1f12. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/PLR922323202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857752eae3c049a02cdb7321e64680bf48ba52de1a30e690b805d4f41d9f6444. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB382200236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857752eae3c049a02cdb7321e64680bf48ba52de1a30e690b805d4f41d9f6444. 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/PLB382200236.
All Night (Extended Mix) (feat. Scott Mac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0181df73a0c8c36aaafe6967fb059fe45d020aee18976af9de477e0757da169b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLB382200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccf100177ac2e58c5c3792ced170c46f44b941b3116533f1cec237cc0e45cd3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATB351300121.