Michał Szpak (born 26 November 1990) is a Polish singer who found fame on the inaugural season of the Polish X Factor in 2011. On 12 May 2016, Szpak represented Poland at the Eurovision Song Contest 2
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 0x8817e2c9ce239bf8c130325dad174e067955ed74c9e9fd39205181c1d12a3972. 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/1473d2fa-b5e5-4812-8b34-781969b721ff.json and https://artists.proofprofile.net/proofs/artist/1473d2fa-b5e5-4812-8b34-781969b721ff.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 0xcd326f2d40507ed3e2ad62542882665e596a9d114f6e4173fa8372e5a24c8731. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/PLUM71100774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf25fba4ef6981febc3d7ab0086b6b871abdce1dc9e6a1977c9d9570e25f27. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PLB381500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42618030a25a85adce10e30db1f483f03a7ae7a261ee75727113050bceedcb9a. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/PLB381501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c0d5defc2ab27e7a83ba367d9ea2a80c63e61bd53b250711bd3ef2ba5abd0. 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/PLB381501101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d161abdf8276f377fd6a66e4821555d5f68a576f3c1b4ae8ed3456f23c741f. 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/PLB381501102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52145503201e8bc5d1106b065fff8c4e9fe054ca3682607b57e60bb3d750dc75. 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/PLB381501103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ad55fef0c63e11e5de7f091572dae2224463330d851fc765cb3e40060de87d. 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/PLB381501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe982e2a09942f85fa8903e17676cf5a84ad32114cb85b7aebafec10e9891d960. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/PLB381501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3814f3b7876f39ff85f9b96ecd36a6228e679ca56eafe21826d7362dde973e2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLB381501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653fdb19699fdcce8e454de5e1ce823f9df86da4272e9c86f0116285d39f826. 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/PLB391600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ca59af85090f83bd56d740ce267db3c7fea8ad1fc738af64815c233fbfeee7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/PLB381800412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf399f4fb0588205f8389764d221437ef3f35b71a46a81b494be794430fde8848. 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/PLB381800408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ac6a739f83a7c9ec979e25062c145458b6d75bfd7016da76d591300c5dc07. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/PLB381800419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21496b19d4e11e8a854eebf0d9c3ddb592c490b7a590c1caf8b90aea14277719. 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/PLB381800413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb8b91f85c6cc103879aad55571527059964db5932b607d56bdb8e08e0f2a07. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PLB381800414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffda9b659e91973732da7e906d650d68ba211fedabb062f19f30883f9e8527. 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/PLB381800417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e2730d7b37743f37cc68ee161085c87ec64048af5d5e5d306fb5b39cf25e8. 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/PLB381800425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59ef05b8423dec436b767c01b714b4ee00b9da90a9433d75276969d9fca9df. 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/PL82Q2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f474b893dfd8fff1a1b825b2f1fd1f2a6e776e2fc0148b6343cba09e00327b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/PL82Q2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7669bc3a09c492d615fda0f03da4a698db6680592511f4d48a9b8fac5001b6a7. 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/PLA552300564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf796342208a7fcb0830dd7a13784cea1f08f8f9166d8bf39cba0ff781ce97786. 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/PL4B72300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc356bfb19cb32b6685e22bec8fc064e535bd74d0eee95a02fe538fb07b0d111b. 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/PL4B72300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f8e8e553aa262a77c56f2afdd9671227653230a32ba2d3755f816a3aba1aed. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/PL4B72300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb367bb6b046e5eccba301dbf0326771cf2c5a69e75652033baf24ddc4afe31. 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/PL4B72300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0626c8d1dad263527306bee5dd4733e050bfa2af7988f89445b6bad843c4a6c. 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/PL4B72300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb316751429af65cdec9d813eceb273a169ef83508e884e394868a3f7e6e35e6. 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/PLA812000023.