Urszula is a given name. Notable people with the name include: Franciszka Urszula Radziwiłłowa (1705–1753), Polish-Lithuania-Belarusian noble dramatist and writer Urszula Augustyn (born 1964), Polish
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 0xdeb3b07a7dddc80ca9a4da13d1ce0a1d173316876a148913a6d7f122875f47c2. 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/9d2c89f5-c112-4458-9f81-e199b05db30e.json and https://artists.proofprofile.net/proofs/artist/9d2c89f5-c112-4458-9f81-e199b05db30e.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 0x51c0beca7256f2112e7c8e616c755a20a00994e6be24eb7eb79c9d81ec7934ab. 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/PLB111800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d5948badce454b079516d1645d4a4019020986f6a5779e52d54cf3afeffb46. 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/PLB111800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e802fba23c409c7eef730f1744339dc31d89855175d7a980d1f94960ff97adc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/PLB111800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be110dc9c7af2472345579bebe79caa87d0c60b63e6bd026ad130d32e44517d. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/PLB111800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe03593c580beb710bca63d355f9816d9c00c3258f2cf742a7b5d8872a64c39. 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/PLB111800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d117997dda9eaa3b272510a1865566ac2ebf88f823e8d66e667a5bdbc7a1bf. 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/PLB111800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c546ff12a0fc8ff40b1adf1b3a89c8c029495e75c0f837a973074504a99518e. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PLB111800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c24d7318995bd55c37b3c3bdc66e00b181ef63eca6e9d70626d70d2690c6d4b. 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/PLB111800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f5699ffef7dc8a402cbd9d991e976d1d32fa00b1e91b1886de0980f1f4b17. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/PLB111800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bb99088115cab81f4fd1eeb45ee6319cfae38c9ead6e1ac429d0df93887d2a. 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/PLB111800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926ae2d8c690f566c74500b1d116e05ae8dc926d77d74fc0ce00ba4bd1c7e42. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/PLA281300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff4e6544d3fbc0f687419d8c443259f6c6c49ce584db213e7b46691096b9935. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PLUM71400172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b33f5d06f264881c7c52f910b3cf649a51708f3bdbc0c56db2bd721160012c2. 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/PLUM71400173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a03f20824d95125efd2589ad185d6fd59d15f9bf2b37f7846b1ef6b3121c51. 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/PLUM71400174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ed6283946e9ea7951750414198129afbe1ce1d0e0d90bb09d1fc59e57ad5fc. 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/PLUM71600708.
Zlote Przeboje Akustycznie (Acoustic Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0936d14707cf954fe8ae3c27c2dcbc2e8c7b38b1ff97478ba142278f18365e4e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PLUM71700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f3eeaa36f37af0201685396541fcfb8a92d6808b06d134d03a0a96d701c56a. 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/PLUM71700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141bf0f4488c0ad39b67c68233d1f0609d0d32ee201038c36a53e6602165ed8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/PLUM71700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9097f0fea14b7c6ff95366f72cfbdb311b8498513feafcd58777ef220a3b0. 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/PLUM71700069.
Dmuchawce, Latawce, Wiatr - Acoustic Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60454a2a2e64e5b951d80cdbb97a7b978dc3e1bd47a2815897cc3639c9bdcde9. 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/PLUM71700072.
Kiedy W Nas Rozbrzmiewa Kolęd Czas (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e87c50eecf59ddb3f239443d7dbf684c0089be3a69a7bc26fb486abb596186. 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/PLG942000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913819b264fb7d659c6b460e3fcef114596b6ec88c387229ff8894f32a7fc61. 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/PLG942000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0d716013f250bc929a6b59f930829c9410756b0688429ea38c404d9eed3291. 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/PLG942000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2776b51b58b52f3fd5660886bbf654a6160d1d3182108a4ccbdf49296f40ce8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PLA282100149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5abee522be7a9115600f6eef803b3deff18eb5c998deee83b57f8854ed4d39. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/PLA282100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5616af8d2a54faf42bcb0fd9b1ed7af4974971893500d2e9c1867cfabab0e88e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLA282100206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8f446efc155fca69768573fae966d852da78f9ec67f66c76110f18cb0c367f. 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/PLA282100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0650938f046255b718212bc8dd09ebb39e6ce1dd5431e13028a7c04a5fe32f57. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/PLUM72100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0027afc011382b28a1a263b7004847d1eba1fd59ea490bfb084ad6f6ba142357. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/PLUM72100699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3ae057ab9ae1164bbc35c1b9bfea52d163bc49d93eb495b195268ab6514207. 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/PL48T2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650b0e488e5fbdf7eb0f5d05c57b10fad5302fd8ced62f584a715a2d2c2e9d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PL48T2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fff208e7511c772e40afba30e9cfe0ad9ce9178352a203b96f63cc37b4cd9d7. 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/PL0981500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b7bca807491ff330aa80a9b02c2a0faf551926e495637b446affb8d934d106. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/PLUM71600712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e6e6cd72d7971cc482724e6ad89807deb1909ce69443c6499633142439dda1. 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/PLUM72000304.