Grzegorz Hyży (born 27 May 1987, Gniezno) is a Polish singer-songwriter, who rose to fame after finishing as the runner-up in the third series of X Factor in 2013. He is currently signed to Sony Music
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 0xf9990fb19ce6e047c96ce65cd36f1dda271b5db307d0ae9748a29a244c18f5e5. 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/383a5111-1e6a-474c-91c3-d4eed587ba3e.json and https://artists.proofprofile.net/proofs/artist/383a5111-1e6a-474c-91c3-d4eed587ba3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wake Me Up Before You Go-Go (X Factor 2013)
Too Much Love Will Kill You (X Factor 2013)
If You Don't Know Me By Now (X Factor 2013)
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 0x97fdb7dba943efa8806c3212b36ffa1c49b80b5e39222ef122af5773d79013f1. 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/PLB381400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fdb7dba943efa8806c3212b36ffa1c49b80b5e39222ef122af5773d79013f1. 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/PLB381400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6a7c433b33ffbab4a453110b7e2ac193209501c65111c41544c008b8ce0365. 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/PLB381400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a6f90ee5c4c9bd2fa9fa596748090ba5efa5ae09eb7da105fbe8ed174eac67. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLB381400161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea9f99c30b25f49d6b7c6f8852070d51d9c25cb8ba9ca1ed2902be168b76140. 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/PLB381400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b0b39ca67860ddf2c9c0367c2a6ceeddcbc7580c1f2f18be3fa84ad490f832. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLB381400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a9492d15d85501021a5b61e24c33eedd3b9b24513878580dcd9e3cb6b8c73a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PLB381400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d72a3e67fb8086da51b15279ab3ee50bec2c6c037e670c890237752fc5e148. 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/PLB381400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317be864c9f53faa832228602bf9788d8fefcad4dc1a92a36abee4e31e6a865c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLB381400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f1cef97d4fe194cd6d4f7ec2f90cc3107b03f1a5bb2e43ac45f7ce6bd5e8d7. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/PLB381400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe279da0f90f919c903a3c2bfe7180c288cf8e347753e12ef82f7dfcb633b9442. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLB381400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9471f8f469368f3dae10f20877929785d438dfeacc3afb9fe380357dc442a440. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PLB381601467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc736139e1e0165be8106fea35344e170db144144faaebe1bdbfc19e7bcc5b59. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PLB381601464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0604e4819d7a3a63df6ec2cbbd5bb4a02aba7921f4d1778f27ef7b24cd97272. 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/PLB381601466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a0c9160dd5af75466fbe4dfb68f8ce7610845b9fc20c27a0ff5aa74c43e4ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/PLB381601465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883e0cb47f8df71a9f0b34f9cb0a955bca6ba8987c1c952bb2ed0b3ff843b288. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/PLB381601468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2af50aa1add88231fd6ed56c21d95f92ccfa9f4ffd202bac7dd7b0b6b7080e8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLB392200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa577a6f341cec91a9378f67b6528a01ae3a446c6bc4251640e1f7ba0bd08a9df. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLB382200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe996b73e4f29f6e1acb0811280b7f8c30956bc63d433776007ba3be018e27e7f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/PLB382300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945fd480d5f5a09da471c541885363268c90bd6aeeabb195c6c7644fb5cffe1. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLB382400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa577a6f341cec91a9378f67b6528a01ae3a446c6bc4251640e1f7ba0bd08a9df. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLB382200128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e6624cad8cfebb3612b93a5ef4ae6ee7117dd66bb4f0c0dd51916bbf3806dd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/PLB382400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84838015b97440694c0adbdedd3d3fea46431b4f6908edf5d7b2f0c7f260cd94. 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/PLB382400745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fdab09c24103dc222b94cfbfa3e7c16d32cc4a2370e46f3a9c53baa0a22b18. 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/PLB381500656.