E!E is a Czech punk rock band from Příbram, founded in 1987. The band consists of Bořivoj Řehoř (vocals), Petr Bakalerov (lead guitar and vocals), Petr Stawarz (guitar), Petr Mottl (bass), and Roman V
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 0x69d8f58da3ebf6b731ffab6677c0d178e7302d131a5438b2550a713bc84833a3. 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/f71a4f54-71a9-4743-89c2-1ee484cb3102.json and https://artists.proofprofile.net/proofs/artist/f71a4f54-71a9-4743-89c2-1ee484cb3102.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 0xc3e559ee4eac954503a1a3d0311a83ec95b76d36e18d1c8fb47028b81aea08fb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CZJ701300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e16733d6293f9fa811d9b76ff7fca97ff2af852a911090bda65fc97534170e. 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/CZJ701300224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d6941ba4473f53c1d00454b318aad1e24d3355195ee67c3738e9c11c45fe15. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/CZJ701300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38046e459642dbef655898e5c5da1303f618cf58750ef8258fd711f050de806b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:37:34Z), 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/CZJ701300232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be247bef04d92b8a8cb3fe2042030a9563b63a91d5415de3722ae777ab8af2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZJ701300264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6638e1014fb05bb4c2ba0c31e2ab39a61ae7d69a98e14a532c53d2faf719957. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:24:18Z), 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/CZJ701300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b3abe309e686a9958d4b3787e0e8c4ecdada9396bd975a8615e5cb4de17d0f. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:18:34Z), 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/CZJ701300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee72ec20365fde870b31c5e462b9ee3b24ffe0008942d100c1836cfbe42355. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZJ701300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a72fbe3424e9d7a07fafd6241923b8736860e98305273e01cc49c91186b758. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:24:37Z), 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/CZJ701300272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bd3bc468a8265195626f46603e5992c6c0ab0d55120656ac8d9adc555389e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:02:41Z), 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/CZJ701300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb6dfcec9b4066635f3790b828a0ff26b5c38edcd441932fde756482ea4e3d4. 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/CZJ701300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b4d8638c15d18b404f685255a19f169dfddd6689940a378b7e893db985645e. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:39Z), 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/CZJ701300287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377882c30ccd58afae6e4079d39b3e413077c28883aca0fc620d0f870f0fc2b9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZJ701300294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047671ceecc527bead2d5d0d5836cbbcf69e64a9fab14f025fc3ee074eb4aae. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:01:54Z), 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/CZJ701300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f787a8a7cf1caa72c8376e0b656e0be7d1a305e218935dfa8bd3c408a603ecf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CZJ701300298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1412e4e1e1a880119774fcc806641ffdd58b222f10d960be853c68dbf752f3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CZJ701300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc780a794e86f454163f4b10d2fda57a618c5e4221ff2383eb903225961cbc24. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZJ701300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dd4cbf59d61c5cba18c3c897e0f5e9880317779603f0022522193d1abfb816. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:37:35Z), 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/CZJ701300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe85858da32d3bb673a7caeae9d363ff6798b4a90bbd4f48161e688eb9e53a8b. 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/CZJ701300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0366229cdf7ff33dcbe89ce9570ad6d739f9ba162b6d89806d1e1795dcb3a394. 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/CZJ701300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c3757b532000cbfa3b0b110a8217546d726f99c8125435a15728fd3906154a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:57:27Z), 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/CZJ701300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33eb4ee41cc3eaa2d49042394198f02e777f53eac7b1f6b62cb34738a5540f2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CZJ701300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d197814fdd4d23f3052d298d5a97fd8ea65d966d50a7b10a8d46b97aa078475. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZJ701300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8fcee0363b9609ec875fcf4618322d294fc2ae701e5f0549291c2ad60b7930. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:27:19Z), 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/CZJ701300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241e3dc93cfd708daaa1023a352690eb4a6e5b618ebc37890708b91938889f1. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CZJ701300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2480a27e3928133462ef014b2d59f566dcf06872f42d3d1f326a9fcbc58f292. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/CZJ701300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6e0a4dd7d2874f7d1e2b4d2b6e005103a16c8a5c26dd8f66f03afc4dfd5b17. 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/CZJ701300327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1c37442ba6fef917d9ab908ee9ab8f5fda97e2373b74041b31a6e223b09022. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CZA162251719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf831bda8be695f1f132d6ba8742ff0174bbbbe162df1fe182a13fa5b8a1993. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:03:22Z), 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/CZJ701300332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50ee9ead107415fe84e223274a6af348149931370dbd90c4a47eb1ac68069d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CZJ701300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4288e2d8e3808f90460e3e7e39a2fb931f95311cada4c901cdc4e775b26bbf4. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CZJ701300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e2fa13c1272c2c8fd67f0671e01a97e5b5d2768b6cd41f38dff1938d16ac53. 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/CZA162253544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b80a51d6f41d6a292516fcf1389f3398562916e8b9332e1b9f86c86d064cdd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CZA162253545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d23cb1fccbcbb0c6841146041402a4f0885c3126960f6177f21ca7b523ed4c. 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/CZA162253546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9badd3263ade1744dc15bb9fef07f9377a854ce111e0edaaac5c74f1e84af10c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:33:36Z), 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/CZA162253548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e4406f66818e2700d428a8ce20f836be3b91fc3063128ea20551200902fa71. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CZA162253549.