Mucha (; ; Czech and Slovak feminine: Muchová) is a Slavic surname, derived from mucha, meaning "fly".Dictionary of American Family Names. "Mucha Family History", Oxford University Press, 2013. Retrie
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 0x091d24b9ae53cc353257ccb23c8e0b79b791bf7dfc46b58f2335d5c3797f4f79. 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/406a1d07-b7d3-453e-af1d-14a102ae8cf3.json and https://artists.proofprofile.net/proofs/artist/406a1d07-b7d3-453e-af1d-14a102ae8cf3.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 0xaa30d383eaf6dbab0495fc61ff55b43ce63a2279bce841aced28ac29158aadb5. 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/PLR862300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965617e2d1808bce648fca354d3b7425301202668a1c54ec31cbcfd3e8fa7bd9. 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/PLR862300382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bc49ddfcd5d5c110e9a9a65f7dc43a4abc8b196989a3b12babeb6886d971d5. 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/PLR862200792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbb92342caba8a2c1912b8d862f4fa6ebb4092337b85b1c495e09a30f735f22. 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/PLR862300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c09e657cc2e9e786a7811f5944f2b1dcfd5ffe05af67a8978c27a28b20483f7. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/PLR862300383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aec40c796cf2928121344c0f4be0127353a19cb2fb6152dca0aef930e25a14d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLR862300758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d28e555980893c8825a99fcbd9f3af5acc00d6f820293ddd09a186dca682b6. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/PLC062420073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e2c05ed07559ccc2a55fd2c3fb4e5c3dd894a4577a3f3b28cd2974250d09da. 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/PLC062433827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83e55267ed2f7853186584742bd838fcdd4bcdf759f339406bda700e9de5a3f. 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/PLC062438226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa00037dce3285c8d204dbc94b4b483a2a665665e55c4650e554da12a40bcf5. 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/PLC062510452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225eeb5ac30ac352b8c8cde1a85421bd56fa6eed8740e6298deec750c478abc1. 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/PLC062515038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b13173e2aa04805151ded78055d74efa22f94cd902c3d62cc8a2b48130e298. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PLC062529499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9f9c11cb288361cca7566ffabb3a3b81b97f76ea07f396b104a9699c2b3b95. 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/PLC062542803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a02f56964ada16351b83b8dd0c866e55735782b512cb8f4eaed6cfc2acf16. 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/PLC062546248.