Małgorzata Magda Umer-Przeradzka () (; 9 October 1949 – 12 December 2025) was a Polish singer, performer of sung poetry, journalist, author, film director, screenwriter, and actress. Umer released fiv
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 0x7bee4e66af3cecd6a4e7f6ff61e80a676807a07d348c0ee72f9b826ea46bdba4. 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/d1f0d4ec-4833-475a-9b76-064531351e70.json and https://artists.proofprofile.net/proofs/artist/d1f0d4ec-4833-475a-9b76-064531351e70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Koncert jesienny na dwa świerszcze i wiatr w kominie
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 0x4320b383ac4cfeeeee6a3d4c525d6754d90a3002646ef2a35e3327595c350cc0. 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/PLA247216173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7afa2dc993200f253dfd5ae11c1a3094a89a0a6b0a60c163c0cb9882af86a5e. 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/PLA247216175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a34ed6530734f004c012daf59c5a922285b62c3113136aa8984260c26f92f11. 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/PLA247216179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd8d564b23a1478a15a868ea14d82ec72b0d461bdaf52fcb9f81ca919d5a23. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/PLB171001237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfee3a05bd62b678e5fee26072ea3e99bc9acb07fa95ad6c8f9b49d694b0921. 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/PLB171001239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d451fc9ce572e844fcb1390d3b8c671057f2fe49ac6e1c9b3459b8ca78dc0. 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/PLB171001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177f88fb236e23e8992a6fb716a9d446f6fbf728556002c8ff789fce18d1632a. 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/PLB171001241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f8ff7d01c411c54cbd7cf0a4aa2432a78fe9c0d85fd709d56b1426d7b26c72. 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/PLB171001243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d990aec6067755093a9b743a07eefcfee97eab4f16dd02e17087725da4edf48. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/PLB171001246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a87f93287fca04244d72e39e97a0a2a7d3485c5985cb4eed526e6289e6ad49a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/PLB171001248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa864f78690d2c5565ca5500e7ddfc4dd846f0f228badefbfef7468b629d9f4f3. 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/PLB171001250.
Śnie, który uczysz umierać człowieka - Śmierci które uczysz człowieka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6dba49de7833965788ac4e4c385edf46966b7a187feefd5111c4b79d8b7ccf. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/PLB171001252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a2c2338b11a75ef730f9b661b6a9f07b4a197bbfe93186a41a4998fc9559e1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/PLB171001253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917b1d3fbf6084499d991b6e4d7227f7c76748c7f9dd5a0ab09cd353346617af. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/PLB171200681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64810c7122ce118e0a2754361c5dc719a09468e3ca45b77acbd74273b60a62ac. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/PLB171200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10a7bd7275aa003ac9a6a012e4510fdc1c35cfc4fd7a8817a3b2129c655bf02. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/PLB171200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a218635a8fbfe6da120bdcbbb251d5cf1fa0271b0e868a523ff008371a0bc59. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PLB171200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83191b28148bcebc9dc6e5e2b4c1f1b2c81cfb44a483f7c8b8ace5e65770c15. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/PLB171200692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18029c32a0d0e4ade27587cc38a5e5d05fcae4357f81ffcae98161aa89849afc. 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/PLB171200694.
Wciąż Się na Coś Czeka - Koncert w Teatrze Polonia
Wciąż się na coś czeka (Koncert w Teatrze Polonia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d3cc00a8c3b0917dbec8d7f08105fae21fae53660a7bb52e38d13bcc01b6bd. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/PLB171302532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0210b9f3c0ec59f447824fbab8c92348326c696adad2c0edb95efae01b85b6. 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/PLC591600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c6e38951f892c3690aac0479d85a4f73ff89810afd3878ce29696c768af7ea. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/PLB172100311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a60b39a3be5551691c9b3e3133a933f8156136cdd2e66998e14c3597a09de2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PLB172100313.
Dookoła Wojtka II - Jeszcze w zielone gramy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374b5da1812042b058944710c039bd75e8ccfece75ac606c3feced073fe7c283. 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/PLA391490417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1cba09297016e868426a0725d772c71e8d908954c33b5c4f088c8923ff9221. 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/PLB172100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9787c40eff9fa3360277eb2111d50640ace3d8f9cf4933b33ad3ce0846feec. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/PLO981900012.
Agnieszka Osiecka - Kobiety Mojego Życia (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15587acf0217af63f26f28d6a3c40c819ae192e115aef5f31df0bc118132491. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLA391370912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa01ba7907a1a726a003bd85ae67ab0a682294b29d74493722510c4a935a5df. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/PLA391370913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c237d3377109373e27521ba5ef262828aea4d199962d808c507892234b19ab. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PLA391370914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03877e3d61938bda230c01e419140b20eb55b4e8716afcd35388a123e5ca2b32. 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/PLB171500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbdcf3c7b52528047a6e0508e264c3fc99d94abab132d14e2d48e20a47b91ea. 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/PLA391592316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d990aec6067755093a9b743a07eefcfee97eab4f16dd02e17087725da4edf48. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/PLB171001246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd447f37d58af63a7fe4ee948ac712dbd89030d610f572f318e40e0b6c62acb0b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/PLA551100332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67015238e833984cbc202c888bf1c79ceffab5c8e5b77fbc45ea7344d81a3f3f. 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/PLB821900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e124db99ca62fdb14c3c9163bdec99a39516593b6be415fb03bc2f0a3da3dea. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/PLB171001247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133962aff7989b1df1ccc8793f006c225ffa769c658b66073a231092cf23ac4c. 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/PLB171500221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d95f137c05daaefbd24c317392c366eb4a911b69acd380a26784d238e6609. 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/FR10S2029926.