Bogusław Mec (21 January 1947 – 11 March 2012) was a Polish singer, songwriter, composer, and artist.Bogusław Mec nie żyje thumb|Boguslaw Mec Street in his hometown - Tomaszów Mazowiecki Bogusław Mec
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 0x31610aad8a5e927df3e21641731ea3791047215bb562a250fa0f90519233e3ea. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/705fde24-a2e6-423e-9765-e11cbdf2fafb.json and https://artists.proofprofile.net/proofs/artist/705fde24-a2e6-423e-9765-e11cbdf2fafb.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 0x6f274983701f3cb6a2efd5ea90f214ee55b490e6bdc2a8ad9aa3ccc97ed113cb. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PLB171001255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6457df7f57a1f3bf08cd3546c4a18bb15790e1b82f6c0449053141c3f36936f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:57:17Z), 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/PLB171001256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7345bf389f79c28f63f2a626cad7f20d50faf6b393cdb8e9f92db031719d1ba. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLB171001259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ace73e10ec00c9d12be6487934fc759c475219fc95d6d1e93794690b5d056af. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLB171001260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6a132f6cd2de8cfed000392cc61e8522147700cf3d50d83f0a10ff6d8225b2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLB171001262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ead4097d58bb0a3e4f1b82c607c0e21ab3b799c6254c8a7233108af7e96ee9. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/PLB171001263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6dc04c19a5f33ec66f25dfa266f8cde9ad6e7eb79dd46e250052be85b5e6de. 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/PLB171001268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde623f47ae07a1139a1d4757e72a7193eabc35445fa144f236c5f28106166d. 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/PLB179800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826def57bfa2780c5a08b89bedd6e821f128c9212070b2a8d95488014a391916. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLA390599402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c40407543d594495e3ac5e3ff6728bd45b0b7fc42027ad8b8424fa10436ebe. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/PLA390599405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ed789934b2311dff79b17791d8d96bf7274aab6b373053f6d770d14ed643a4. 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/PLA390599406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55d4832f1a7f3c92b285429b5de2f14fcbd95a68391ca8cdd5c1192f5a19cd5. 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/PLA390599408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26923c861d423bb87fb11ed89fc97b256e924ba1ef8528a608ca04f692f0627f. 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/PLI365126820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4a592e4dfb28c4fcb290644949a20e7ad7d60e4035334a284fa86cbbeac5b2. 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/PLB171001258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0c1f0bd681e85514432cdfe755f8ba1ccf52822a71531e59a13f71fd66b76b. 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/PLI531400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4a592e4dfb28c4fcb290644949a20e7ad7d60e4035334a284fa86cbbeac5b2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLB171001258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a634723817a7b34f044a66b4ea21660415d59f2a7f34c28e6fa9440b53a3c0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLB171300243.
Wojciech Młynarski Zaśpiewany (Dobre Piosenki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7822d6dc2dd0e9faea33e7f913580eb4695d60292700e44e92f87d7298d6ac5c. 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/PLB171001257.
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 0x3cdcbcdb0f28cc155fb637b938fa47dbc1076e5109aef6dd2d2344c2c0533501. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/PLB171001254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e32efde5be6809e2a82742f5d477c8c962a8da1f9f54b10fa5e5dff8fa3bb1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PLA391490308.