Szpilki (, ) was a Polish satirical magazine. It was established in 1936 by a group of lettered leftists, including Eryk Lipiński, , and (chief editor).J. Łojek, J. Myśliński, W. Władyka, Dzieje pras
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 0xab1cdc8ff604e2c05f9fc7b85b89d0747db0ed920a0fbb657ae88db9a4a01e93. 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/d375bc63-604b-424c-9b12-3c96bf244ca9.json and https://artists.proofprofile.net/proofs/artist/d375bc63-604b-424c-9b12-3c96bf244ca9.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 0x04e21a6f09e8d95cc341bfc75216ac3fa4e8bbb3c2d05cb822aede0685db8874. 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/PLH752200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3f7ae424dc29ff973fd8175b52f9658213aec9c8e113738b2d21f08721ad10. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/PLH752200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb257b289973c4c9d6da2172fbf137f1c7e354d33caf55b9d58cce0d5e6e0f5e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/PLH752200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192e98d3d9fe07e19e66f96cfbfa3cf70d752d7904e48c02ceaf94654149c3db. 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/PLH752400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df070875fbd6b1ad779e1e26a0406986af998ef1bd11b01f1f66729edd4a4a5. 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/PLH752400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb53c8d4789cf2d791b2fa9c4fc07d6f4d1d11651188fafc2d8c5fd5ad0a7b2. 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/PLH752400079.
Składanka do auta - największe hity Disco Polo 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda93573abe060f57ac4fb3e22692056e4fc342569cb6e8ddeb90e01709ae25e. 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/PLH752300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71eb7da773b59dc3ec937a642cb487acb117ea0ad8ba99d7b493461c62aa23f. 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/PLH752300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192e98d3d9fe07e19e66f96cfbfa3cf70d752d7904e48c02ceaf94654149c3db. 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/PLH752400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd238603af959b84f142e875b5762a98fd4aacc3d941d67e8ee156b6b8cfb33f. 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/PLH752300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d14232c0b70cbce3def3487bc8ba99182276b7c47489b934cc073da20527d6. 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/PLH752400017.
Sylwester 2021: Największe hity Disco Polo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56caecc71edd75fa8e01d9cd0f35ecb773697e882018375ceb961d22e9c07426. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/PLH752000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9192ad5f7b8c6fab200c37b1c7102729ca47b7637cca13c950a7135a9e3264fd. 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/PLH752100013.
Składanka na Sylwestra - Największe Hity Disco Polo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9192ad5f7b8c6fab200c37b1c7102729ca47b7637cca13c950a7135a9e3264fd. 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/PLH752100013.
Nowości Disco Polo - najnowsze hity 2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb53c8d4789cf2d791b2fa9c4fc07d6f4d1d11651188fafc2d8c5fd5ad0a7b2. 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/PLH752400079.