Kombii is a Polish pop rock band created in 2003 by three former members of the group Kombi. In 2003 Skawiński, Tkaczyk and Pluta created Kombii, without Sławomir Łosowski (who was the leader and cre
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 0x5a09dc45be2d0b468c4426f34c924d3ee968b725a61954b14c9d1e7f2a80168e. 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/d5bee437-68b8-45a6-a148-64200720e9b8.json and https://artists.proofprofile.net/proofs/artist/d5bee437-68b8-45a6-a148-64200720e9b8.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 0x998cf6024e77f1fee49afbe382278188a618e6ced2334bf7a66aaa93dd3e5020. 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/PLA210400323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32e9e78a424ddfb18138de03b5e098ca1c9c23ea79c1948bc22f140f8b1d6b5. 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/PLA210400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18498a3e1584056b37d37fd906d5dcf1f1e1f1e6ecdcee247ec9023d2d536855. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLA210400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9c4797edb08ac781c480da0485d1ea8206aaa2511a806acc6a4604ef2c786f. 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/PLA210400327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23a393910b6061f9cf624819105d904ca43c7417284c4bb441650c6ea632c1f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLA210400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8857dcfd4eb9dc8d5376c686420e636c3c9384bed6ab039ab2eddba025870ceb. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLA210400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595e05b9515e4dbb050bf3ae3054cf683c7390713e03e986868e30d74260815c. 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/PLUM70700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6040a1c72e7b8ccbf72e4f86c3ab98b0264099ca2e86fc6d4bbef7e8e4b804c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PLUM70700262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1bba3c9477b2a587c46ff7c55fc2d9a4fb4766a64b8734daa29b8eef088642. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLUM70700267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f63679b4a0daa9b66e6127eaaf1fdc36b41a4978c8eb99ccfac608e4adbff48. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/PLUM70700261.
Slodkiego Milego Zycia (Silver Bros Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dce72c9829014dbe7f0998e91795e442da112d98711195727156be3842e39f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLUM70800331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732a5daecf50e967e8a82929a0ee7da244b156c2f2309ecf9ce35f0327d67427. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PLUM70800336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799d0f643e2e7f9a2dccf4ba62822e1b310f12249b83c56e6b3534435d0ecac7. 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/PLUM70800261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ce424a3ef237c226c3aa8170b79da36aff26f11e90c6184b5ba5598b999638. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLUM71000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e1b34d7d51beaa89dfc59d0099661643bb90b86aa04d5a9fb7eed6e2813c31. 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/PLUM71000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb16ef531833675b6b66c669b15eee219fa125bee62bc8c1502a02e7b9b811. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PLUM71100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b6a6bac75bf6ec12129e03b1ee58609327cf9344761c1daaa8f47fd53a3f9b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PLUM71201235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24eeef629abcd5209a6c2667b425ce59eb56d11fbc5c3470d2d8ee4515fadbd5. 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/PLUM71201238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a0faaf1871c3ff0078cbb4922b89efc247e0f5669f7847f62bbd84c51e43c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/PLUM71201239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7e71cbdc1973cf55d889bd134e0afa9b5bd42ff60bdf8f95e55ac22a42463. 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/PLUM71201240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38036133419cf1cb1a32cde11ee8500f6e1303ac9af0b539efbdb60f418c9e6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/PLUM71201241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05075e7ba87988052ecec530a3300cd656db3d25874c29cabd12a8208fef8926. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/PLUM71400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec5b3ea816f738eeda36931ad0da7d4b36fdfc70a2ed4b147086df10c35dd16. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/PLUM71400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277dd9b3b534bcaaa29d015d113a71d373a9a16331931fe07f99c8056749ffc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/PLUM71400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c225d0bea67934eafb2c14089597245f391a818c2857b803f4d4dd29b043b86. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/PLUM72000426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bb230af2f2a84bc3015138edb6bdac9dbdc87be6d07b8c875b6ceeb1a573bc. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/PLUM72100477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495064021c4b8aae915510ccb5604147ee7d91d7fda0b1f7765e8f4dba928349. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/PLUM72100478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec906a085dbaf1caba4ab0a23e2522faae6a4323d6567a67d2b2b078240ed6ca. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLUM72000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de2d5062abb4e4770d113509fa994b2da2337a23329338c520b4b8cd9a3d2e9. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/PLUM72100480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc45762980cabd219ca270670af155f8f90efc9ed7ab08c5d21646d9b346d8d. 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/PLUM72100484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7758c4b3a4adf62ce42b393c13afd2bba6d9a0a865e6682bf70030ad2324374. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/PLUM72100485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31501a0cf0415f8317570b8d9ab1be7e4a1a9f0e6c52dc1726e3e23fa21a5023. 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/PLA210400331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb301ff6b44c2a7e18b858f2f2e7905c78466a1842b6860bcb484b8d3b88ce7dd. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/PLUM70700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0d1deb19cea8aa23a2cfa11340a70ad8ba9722983b9f34788c96388ef90e5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/PLA210400310.