Zipera is a Polish hip hop group connected with WWO and Fundacja in a larger crew called ZIP Skład. Discography Title Album details Peak chart positions SalesPOLO.N.F.R. Released: 24 June 2000 Labe
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 0x6daf7c58f8740c02ec64c608c8381c323c7d95399e0599ff29d6519f7c0a711e. 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/0b6c7603-0510-4d07-a55c-77cc62bff97c.json and https://artists.proofprofile.net/proofs/artist/0b6c7603-0510-4d07-a55c-77cc62bff97c.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 0x7fb06ba9bbbd3b21e43e5b232f3957d6f6d93cd3d284fb9df4f6e2303ff17ee5. 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/PLA430000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c190c0e2c26e06e472072ae8b443e0b2010d0d763535eae2b5fef152a94b9f3. 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/PLA430000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5afd3cb569308fcbcffc8e6c9534a1fa7bda012eacd1eb46a36699e65b1f6bf. 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/PLA430000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3eaebbca4d220a840d381ad72a998da9999229ea6d59dcb0e31b5ed2c733e9. 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/PLC070401002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71ae1f4ca87a6f147d4a130650a9a064d9043fecb4e1d0bd644aca19160972e. 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/PLC070401004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc36ca3388504ce39b9583d1bda35cd4931fe324a0635a2afc02f295faa26e49. 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/PLC070401005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752f14e33f9d6b9c3c04f8110acbceb29c6c1fda88295f2ecd4722ebb167c1b. 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/PLC070401008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69973d5e68201cce8b2481b1deb0f21341e9afe4c4f2684b3a518264d5f1697. 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/PLC070401009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807ffdeff96c3da3701af2133eced81f6183510deff3fe6e422e9d0b66a8035d. 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/PLC070401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f13d8373c596ffa152b7a945ad6f372ea7bf45dd8b2901bcef9308cb3caac9. 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/PLC070401012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c04a67b46bc23ac3f4c0365d93791be92472d1f43cf6e27441891184311b54. 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/PLC070401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678e6d2a00995a29cfd112cd6e986234ee11abc0adcdd3074bfc245ab577b6c6. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/PLC061806823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8792069dd255c8c4caa908cd6742fd365ed24bced9b362a8a8bf7ab50e821. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:02:06Z), 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/PLC061806826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f6339c7a0017ef74f89e85bee97c38d3fe73d212123d00f67db2db7cd422b. 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/PLF391400158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e982b51027b98cd465581cc45f6a56d452ba565aebb505307d71eb9a8dfa120. 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/PLF241705436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc179957371b8c2348be7c3e3c9c44678273e86a0d48c18fd20a6e541d8b9a13. 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/PLC061806414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ea37655899e01d1ece4aab69d0b3a2c0c817cf4c6a9ebcd506f36f732b439a. 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/PLA330100680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba6780e0f8d1fcac0af7447831545815be39c593536ad88ef9252850e75da63. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PLC061504946.
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